12556531 has 12 divisors (see below), whose sum is σ = 13703040. Its totient is φ = 11500320.

The previous prime is 12556529. The next prime is 12556543. The reversal of 12556531 is 13565521.

It is not a de Polignac number, because 12556531 - 2¹ = 12556529 is a prime.

It is a super-2 number, since 2×12556531² = 315332941507922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12556531.

It is not an unprimeable number, because it can be changed into a prime (12556501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32085 + ... + 32473.

It is an arithmetic number, because the mean of its divisors is an integer number (1141920).

Almost surely, 2^12556531 is an apocalyptic number.

12556531 is a deficient number, since it is larger than the sum of its proper divisors (1146509).

12556531 is a wasteful number, since it uses less digits than its factorization.

12556531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 593 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 12556531 is about 3543.5195780467. The cubic root of 12556531 is about 232.4287738040.

The spelling of 12556531 in words is "twelve million, five hundred fifty-six thousand, five hundred thirty-one".