12556887 has 16 divisors (see below), whose sum is σ = 19526400. Its totient is φ = 7174776.

The previous prime is 12556879. The next prime is 12556933. The reversal of 12556887 is 78865521.

It is not a de Polignac number, because 12556887 - 2³ = 12556879 is a prime.

It is a super-2 number, since 2×12556887² = 315350822261538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556867) 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, 5073 + ... + 7130.

It is an arithmetic number, because the mean of its divisors is an integer number (1220400).

Almost surely, 2^12556887 is an apocalyptic number.

12556887 is a deficient number, since it is larger than the sum of its proper divisors (6969513).

12556887 is an equidigital number, since it uses as much as digits as its factorization.

12556887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12227 (or 12213 counting only the distinct ones).

The product of its digits is 134400, while the sum is 42.

The square root of 12556887 is about 3543.5698102337. The cubic root of 12556887 is about 232.4309703730.

The spelling of 12556887 in words is "twelve million, five hundred fifty-six thousand, eight hundred eighty-seven".