12564651 has 16 divisors (see below), whose sum is σ = 18667008. Its totient is φ = 7452000.

The previous prime is 12564637. The next prime is 12564667. The reversal of 12564651 is 15646521.

It is not a de Polignac number, because 12564651 - 2¹⁴ = 12548267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12564631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2500 + ... + 5601.

It is an arithmetic number, because the mean of its divisors is an integer number (1166688).

Almost surely, 2^12564651 is an apocalyptic number.

12564651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12564651 is a deficient number, since it is larger than the sum of its proper divisors (6102357).

12564651 is a wasteful number, since it uses less digits than its factorization.

12564651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8162.

The product of its digits is 7200, while the sum is 30.

The square root of 12564651 is about 3544.6651463855. The cubic root of 12564651 is about 232.4788649998.

It can be divided in two parts, 1 and 2564651, that added together give a palindrome (2564652).

The spelling of 12564651 in words is "twelve million, five hundred sixty-four thousand, six hundred fifty-one".