140
E140 is chlorophyll, the colour taken from plants.
- Even
- Composite
Where 140 fits
Why 140 is special
It is unstable to heat and acid, which is why a naturally green product fades and why the copper complex version exists.
Same number, different meanings
How 140 is understood across different contexts — never implying one meaning because of another.
- Mathematics
It is unstable to heat and acid, which is why a naturally green product fades and why the copper complex version exists.
- Everyday life
E140 chlorophylls and chlorophyllins are extracted from plant material. Their instability to heat and acidity limits their use, addressed by the copper complexes of E141.
- Science
The diameter of Jupiter is about 140 thousand kilometres (the Solar System). Eleven Earths would fit across it, and about 1,300 would fit inside it.
140 is part of
Factors & digit properties
- Divisors (12)
- 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
- Prime factorisation
- 2^2 × 5 × 7
- Digit sum
- 5
- Digital root
- 5
Representations
- Decimal
- 140
- Scientific notation
- 1.400 × 10^2
Roman numerals
C X L
CXL uses the subtractive pair XL: ten before fifty — fifty minus ten.
Binary
1 0 0 0 1 1 0 0
1 × 128 + 0 × 64 + 0 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 140
Octal
2 1 4
2 × 64 + 1 × 8 + 4 × 1 = 140
Hexadecimal
8 c
8 × 16 + c × 1 = 140
Read as powers of two: 128 + 8 + 4 = 140.
In historical numeral systems
Egyptian
1 coil of rope, 4 hobbles
1 × 100 + 4 × 10 = 140. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 vertical wedges (sixties place), 2 corner wedges (units place)
2 × 60 + 20 = 140. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
rho, then mu, marked as a numeral
rho-mu + keraia
rho + mu written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
qof, then mem
qof-mem
qof (100) + mem (40) = 140, written in descending order.
Maya
1 bar + 2 dots (upper, twenties place) over shell (zero) (lower, units place)
7 × 20 + 0 = 140. Places stack vertically with the smallest at the bottom, so the upper group is worth twenty times the lower.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
140 appears in Numbers in space, the topic covering numbers that carry a documented astronomy fact.
Replacing the central magnesium with copper is what makes the plant-derived green stable enough to use.
View 141 →Everyday life
E140 chlorophylls and chlorophyllins are extracted from plant material. Their instability to heat and acidity limits their use, addressed by the copper complexes of E141.
DocumentedEveryday lifeGeography: European Union and states adopting the E number systemPeriod: 1962–
Science
The diameter of Jupiter is about 140 thousand kilometres (the Solar System). Eleven Earths would fit across it, and about 1,300 would fit inside it.
DocumentedScienceGeography: the Solar System
Common questions
Is 140 a prime number?
No, 140 is not prime.
What are the factors of 140?
The factors of 140 are 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140.
What is 140 in Roman numerals?
140 in Roman numerals is CXL. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be CXXXX, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026