12665634 has 32 divisors (see below), whose sum is σ = 26550720. Its totient is φ = 4022592.

The previous prime is 12665593. The next prime is 12665641. The reversal of 12665634 is 43656621.

It is a junction number, because it is equal to n+sod(n) for n = 12665595 and 12665604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14004 + ... + 14880.

It is an arithmetic number, because the mean of its divisors is an integer number (829710).

Almost surely, 2^12665634 is an apocalyptic number.

12665634 is an abundant number, since it is smaller than the sum of its proper divisors (13885086).

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

12665634 is a wasteful number, since it uses less digits than its factorization.

12665634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994.

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

The square root of 12665634 is about 3558.8810039112. The cubic root of 12665634 is about 233.1000202998.

The spelling of 12665634 in words is "twelve million, six hundred sixty-five thousand, six hundred thirty-four".