12555864 has 32 divisors (see below), whose sum is σ = 34878000. Its totient is φ = 4185216.

The previous prime is 12555863. The next prime is 12555931. The reversal of 12555864 is 46855521.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12555863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28849 + ... + 29280.

Almost surely, 2^12555864 is an apocalyptic number.

It is an amenable number.

12555864 is an abundant number, since it is smaller than the sum of its proper divisors (22322136).

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

12555864 is a wasteful number, since it uses less digits than its factorization.

12555864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58144 (or 58134 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 12555864 is about 3543.4254613298. The cubic root of 12555864 is about 232.4246582103.

The spelling of 12555864 in words is "twelve million, five hundred fifty-five thousand, eight hundred sixty-four".