132
E132 is indigotine, a synthetic form of indigo.
- Even
- Composite
Where 132 fits
Why 132 is special
The dye is chemically related to the natural indigo used for textiles, produced synthetically since the nineteenth century.
Factors & digit properties
- Divisors (12)
- 1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, 132
- Prime factorisation
- 2^2 × 3 × 11
- Digit sum
- 6
- Digital root
- 6
Representations
- Decimal
- 132
- Scientific notation
- 1.320 × 10^2
Roman numerals
C X X X I I
Binary
1 0 0 0 0 1 0 0
1 × 128 + 0 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 132
Octal
2 0 4
2 × 64 + 0 × 8 + 4 × 1 = 132
Hexadecimal
8 4
8 × 16 + 4 × 1 = 132
Read as powers of two: 128 + 4 = 132.
In historical numeral systems
Egyptian
1 coil of rope, 3 hobbles, 2 strokes
1 × 100 + 3 × 10 + 2 × 1 = 132. 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), 1 corner wedge + 2 vertical wedges (units place)
2 × 60 + 12 = 132. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
rho, then lambda, then beta, marked as a numeral
rho-lambda-beta + keraia
rho + lambda + beta 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 lamed, then bet
qof-lamed-bet
qof (100) + lamed (30) + bet (2) = 132, written in descending order.
Maya
1 bar + 1 dot (upper, twenties place) over 2 bars + 2 dots (lower, units place)
6 × 20 + 12 = 132. 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
Both are synthetic blue food colours whose permitted status has differed between jurisdictions.
View 133 →Both are synthetic dyes subject to differing national restrictions, which is why formulations vary by market.
View 151 →Everyday life
E132 indigotine, also called indigo carmine, is a sulphonated derivative related to indigo. It is used as a food colour and as a diagnostic dye in medicine.
DocumentedEveryday lifeGeography: European Union and states adopting the E number systemPeriod: 1962–
Common questions
Is 132 a prime number?
No, 132 is not prime.
What are the factors of 132?
The factors of 132 are 1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, 132.
What is 132 in Roman numerals?
132 in Roman numerals is CXXXII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026