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
- Binary
- 10000100
- Octal
- 204
- Hexadecimal
- 84
- Roman numeral
- CXXXII
- Scientific notation
- 1.320 × 10^2
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: 3 August 2026