12564642 has 8 divisors (see below), whose sum is σ = 25129296. Its totient is φ = 4188212.

The previous prime is 12564637. The next prime is 12564667. The reversal of 12564642 is 24646521.

It is a sphenic number, since it is the product of 3 distinct primes.

12564642 is an admirable number.

It is a plaindrome in base 13.

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, 1047048 + ... + 1047059.

It is an arithmetic number, because the mean of its divisors is an integer number (3141162).

Almost surely, 2^12564642 is an apocalyptic number.

12564642 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.

12564642 is a wasteful number, since it uses less digits than its factorization.

12564642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094112.

The product of its digits is 11520, while the sum is 30.

The square root of 12564642 is about 3544.6638768718. The cubic root of 12564642 is about 232.4788094920.

The spelling of 12564642 in words is "twelve million, five hundred sixty-four thousand, six hundred forty-two".