12917232 has 50 divisors (see below), whose sum is σ = 37389968. Its totient is φ = 4305312.

The previous prime is 12917221. The next prime is 12917239. The reversal of 12917232 is 23271921.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12917196 and 12917205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12917239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3688 + ... + 6279.

Almost surely, 2^12917232 is an apocalyptic number.

12917232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12917232 is an abundant number, since it is smaller than the sum of its proper divisors (24472736).

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

12917232 is an equidigital number, since it uses as much as digits as its factorization.

12917232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9987 (or 9972 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 12917232 is about 3594.0550913975. The cubic root of 12917232 is about 234.6333924642.

The spelling of 12917232 in words is "twelve million, nine hundred seventeen thousand, two hundred thirty-two".