12665232 has 60 divisors (see below), whose sum is σ = 35684844. Its totient is φ = 4193280.

The previous prime is 12665207. The next prime is 12665243. The reversal of 12665232 is 23256621.

12665232 is a `hidden beast` number, since 1 + 2 + 6 + 652 + 3 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3154176 + 9511056 = 1776^2 + 3084^2 .

It is a super-2 number, since 2×12665232² = 320816203227648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12665196 and 12665205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40308 + ... + 40620.

Almost surely, 2^12665232 is an apocalyptic number.

12665232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12665232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17842422).

12665232 is an abundant number, since it is smaller than the sum of its proper divisors (23019612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12665232 is a wasteful number, since it uses less digits than its factorization.

12665232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 599 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 12665232 is about 3558.8245250363. The cubic root of 12665232 is about 233.0975541198.

The spelling of 12665232 in words is "twelve million, six hundred sixty-five thousand, two hundred thirty-two".