12634656 has 24 divisors (see below), whose sum is σ = 33166224. Its totient is φ = 4211520.

The previous prime is 12634651. The next prime is 12634693. The reversal of 12634656 is 65643621.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (12634651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65710 + ... + 65901.

It is an arithmetic number, because the mean of its divisors is an integer number (1381926).

Almost surely, 2^12634656 is an apocalyptic number.

12634656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12634656 is an abundant number, since it is smaller than the sum of its proper divisors (20531568).

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

12634656 is a wasteful number, since it uses less digits than its factorization.

12634656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131624 (or 131616 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 12634656 is about 3554.5261287547. The cubic root of 12634656 is about 232.9098240692.

The spelling of 12634656 in words is "twelve million, six hundred thirty-four thousand, six hundred fifty-six".