12942644 has 60 divisors (see below), whose sum is σ = 28409220. Its totient is φ = 5111040.

The previous prime is 12942641. The next prime is 12942659. The reversal of 12942644 is 44624921.

12942644 = 227² + 228² + ... + 369².

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 7086244 = 2420^2 + 2662^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12942644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12942641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 761324 + ... + 761340.

It is an arithmetic number, because the mean of its divisors is an integer number (473487).

Almost surely, 2^12942644 is an apocalyptic number.

It is an amenable number.

12942644 is an abundant number, since it is smaller than the sum of its proper divisors (15466576).

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

12942644 is a wasteful number, since it uses less digits than its factorization.

12942644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 43 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 12942644 is about 3597.5886368511. The cubic root of 12942644 is about 234.7871560062.

The spelling of 12942644 in words is "twelve million, nine hundred forty-two thousand, six hundred forty-four".