12387256 has 16 divisors (see below), whose sum is σ = 26544240. Its totient is φ = 5308800.

The previous prime is 12387251. The next prime is 12387269. The reversal of 12387256 is 65278321.

It is a happy number.

12387256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12387256² = 306888222419072, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110545 + ... + 110656.

It is an arithmetic number, because the mean of its divisors is an integer number (1659015).

Almost surely, 2^12387256 is an apocalyptic number.

It is an amenable number.

12387256 is an abundant number, since it is smaller than the sum of its proper divisors (14156984).

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

12387256 is a wasteful number, since it uses less digits than its factorization.

12387256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221214 (or 221210 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 12387256 is about 3519.5533807573. The cubic root of 12387256 is about 231.3795849315.

The spelling of 12387256 in words is "twelve million, three hundred eighty-seven thousand, two hundred fifty-six".