12564081 has 24 divisors (see below), whose sum is σ = 18869760. Its totient is φ = 8049600.

The previous prime is 12564077. The next prime is 12564121. The reversal of 12564081 is 18046521.

12564081 is a `hidden beast` number, since 1 + 256 + 408 + 1 = 666.

It is not a de Polignac number, because 12564081 - 2² = 12564077 is a prime.

It is a super-2 number, since 2×12564081² = 315712262749122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12564001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28936 + ... + 29366.

It is an arithmetic number, because the mean of its divisors is an integer number (786240).

Almost surely, 2^12564081 is an apocalyptic number.

It is an amenable number.

12564081 is a deficient number, since it is larger than the sum of its proper divisors (6305679).

12564081 is a wasteful number, since it uses less digits than its factorization.

12564081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 12564081 is about 3544.5847429565. The cubic root of 12564081 is about 232.4753494504.

The spelling of 12564081 in words is "twelve million, five hundred sixty-four thousand, eighty-one".