12456556 has 12 divisors (see below), whose sum is σ = 24913168. Its totient is φ = 5338512.

The previous prime is 12456539. The next prime is 12456581. The reversal of 12456556 is 65565421.

12456556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

12456556 is an admirable number.

It is a super-2 number, since 2×12456556² = 310331574762272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222411 + ... + 222466.

Almost surely, 2^12456556 is an apocalyptic number.

It is an amenable number.

12456556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12456556 is a wasteful number, since it uses less digits than its factorization.

12456556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444888 (or 444886 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

The square root of 12456556 is about 3529.3846489154. The cubic root of 12456556 is about 231.8102640149.

The spelling of 12456556 in words is "twelve million, four hundred fifty-six thousand, five hundred fifty-six".