12657331 has 6 divisors (see below), whose sum is σ = 13079796. Its totient is φ = 12248100.

The previous prime is 12657319. The next prime is 12657341. The reversal of 12657331 is 13375621.

It is not a de Polignac number, because 12657331 - 2¹⁷ = 12526259 is a prime.

It is a super-2 number, since 2×12657331² = 320416056087122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12657331.

It is not an unprimeable number, because it can be changed into a prime (12657341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5625 + ... + 7546.

It is an arithmetic number, because the mean of its divisors is an integer number (2179966).

Almost surely, 2^12657331 is an apocalyptic number.

12657331 is a deficient number, since it is larger than the sum of its proper divisors (422465).

12657331 is an equidigital number, since it uses as much as digits as its factorization.

12657331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13233 (or 13202 counting only the distinct ones).

The product of its digits is 3780, while the sum is 28.

The square root of 12657331 is about 3557.7142943188. The cubic root of 12657331 is about 233.0490726581.

The spelling of 12657331 in words is "twelve million, six hundred fifty-seven thousand, three hundred thirty-one".