Number analysis
132
132 is a composite even number that factors as 2^2 × 3 × 11.
132 is a composite even number that factors as 2^2 × 3 × 11.
The number itself
- Value
- 132
- Digits
- 3
- Digit sum
- 6
- Reversed
- 231
- Palindrome
- No
1 + 3 + 2
Digit sum repeated until one digit remains; equals n mod 9 (with 9 for multiples of 9).
Reverses to 231.
Parity and primality
- Parity
- Even
- Prime
- No
- Prime factorisation
- 2^2 × 3 × 11
- Squarefree
- No
- Möbius μ(n)
- 0
- Nearest primes
- 131 ← → 137
Divisible by 2.
Composite — it factors as 2^2 × 3 × 11.
3 distinct prime factors, 4 with multiplicity.
At least one prime appears squared.
Zero, because a squared prime divides n.
A gap of 6 between them.
Divisors
- Aliquot sum
- 204
- Classification
- Abundant
1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, 132
The proper divisors — everything except n itself.
Its proper divisors overshoot by 72.
How many integers from 1 to n share no factor with n.
Sums and additive structure
- Sum of two squares
- No
- Sum of three squares
- Yes
- Sum of four squares
- Yes
- Goldbach pair
- 5 + 127
A prime congruent to 3 mod 4 divides it an odd number of times, which rules it out.
Legendre's three-square theorem allows it.
Lagrange's four-square theorem: every non-negative integer is, without exception.
The smallest pair of primes summing to n. Goldbach’s conjecture says one always exists; it remains unproven.
Shapes and sequences
- Catalan number
- Yes — index 6
Digit curiosities
- Happy number
- No
- Harshad number
- Yes
- Collatz trajectory
- 28 steps to 1
Summing the squares of its digits falls into the 4 → 16 → 37 → … → 4 cycle.
Divisible by its digit sum 6 — 132 ÷ 6 = 22.
Peaks at 132 along the way.
Written other ways
- Binary
- 10000100
- Octal
- 204
- Hexadecimal
- 84
- Base 36
- 3O
- Roman numerals
- CXXXII
- In words
- one hundred and thirty-two
- Scientific notation
- 1.32 × 10^2
Is 132 a prime number?
Composite — it factors as 2^2 × 3 × 11.
Nearby numbers
Other numeral systems
Beyond the bases and Roman numerals above, these notations write 132 their own way.
- Morse code
- · − − − − · · · − − · · − − −
- Devanagari
- १३२
- Tamil
- ௱௩௰௨
- Thai
- ๑๓๒
References
Further reading: Wikipedia · Wikidata
Notations, naming and the links above come from Wikidata, whose structured data is dedicated to the public domain under CC0-1.0. Retrieved 2026-10-07.