471
E471 is the most common emulsifier in processed food.
- Odd
- Composite
Where 471 fits
Why 471 is special
It appears in bread, ice cream and chocolate, and can be derived from either animal or plant fat — which is why the same code can make a product unsuitable for vegetarians or not, without the label distinguishing.
Factors & digit properties
- Divisors (4)
- 1, 3, 157, 471
- Prime factorisation
- 3 × 157
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 471
- Scientific notation
- 4.710 × 10^2
Roman numerals
C D L X X I
CDLXXI uses the subtractive pair CD: a hundred before five hundred — five hundred minus a hundred.
Binary
1 1 1 0 1 0 1 1 1
1 × 256 + 1 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 1 × 1 = 471
Octal
7 2 7
7 × 64 + 2 × 8 + 7 × 1 = 471
Hexadecimal
1 d 7
1 × 256 + d × 16 + 7 × 1 = 471
Read as powers of two: 256 + 128 + 64 + 16 + 4 + 2 + 1 = 471.
In historical numeral systems
Egyptian
4 coils of rope, 7 hobbles, 1 stroke
4 × 100 + 7 × 10 + 1 × 1 = 471. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
7 vertical wedges (sixties place), 5 corner wedges + 1 vertical wedge (units place)
7 × 60 + 51 = 471. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
upsilon, then omicron, then alpha, marked as a numeral
upsilon-omicron-alpha + keraia
upsilon + omicron + alpha written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
tav, then ayin, then alef
tav-ayin-alef
tav (400) + ayin (70) + alef (1) = 471, written in descending order.
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
- Deficient number
- Semiprime
Related numbers & connections
Both may be animal or plant derived, and the additive number does not say which.
View 570 →Everyday life
E471 may be made from vegetable oil or animal fat and the E-number does not distinguish. A single label code carries information that matters to a great many people and does not convey it.
DocumentedEveryday lifeGeography: European Union and United Kingdom
Common questions
Is 471 a prime number?
No, 471 is not prime.
What are the factors of 471?
The factors of 471 are 1, 3, 157, 471.
What is 471 in Roman numerals?
471 in Roman numerals is CDLXXI. CD is subtractive: a hundred before five hundred — five hundred minus a hundred. Written additively it would be CCCCLXXI, 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: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026