12556131 has 16 divisors (see below), whose sum is σ = 20140800. Its totient is φ = 6797088.

The previous prime is 12556121. The next prime is 12556139. The reversal of 12556131 is 13165521.

It is not a de Polignac number, because 12556131 - 2⁵ = 12556099 is a prime.

It is a super-2 number, since 2×12556131² = 315312851378322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12556139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15336 + ... + 16133.

It is an arithmetic number, because the mean of its divisors is an integer number (1258800).

Almost surely, 2^12556131 is an apocalyptic number.

12556131 is a deficient number, since it is larger than the sum of its proper divisors (7584669).

12556131 is a wasteful number, since it uses less digits than its factorization.

12556131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31498.

The product of its digits is 900, while the sum is 24.

The square root of 12556131 is about 3543.4631365375. The cubic root of 12556131 is about 232.4263056994.

The spelling of 12556131 in words is "twelve million, five hundred fifty-six thousand, one hundred thirty-one".