12641644 has 6 divisors (see below), whose sum is σ = 22122884. Its totient is φ = 6320820.

The previous prime is 12641641. The next prime is 12641663. The reversal of 12641644 is 44614621.

12641644 is nontrivially palindromic in base 12 and base 13.

It is a super-2 number, since 2×12641644² = 319622326045472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12641641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1580202 + ... + 1580209.

Almost surely, 2^12641644 is an apocalyptic number.

It is an amenable number.

12641644 is a deficient number, since it is larger than the sum of its proper divisors (9481240).

12641644 is a wasteful number, since it uses less digits than its factorization.

12641644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160415 (or 3160413 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 12641644 is about 3555.5089649725. The cubic root of 12641644 is about 232.9527555607.

The spelling of 12641644 in words is "twelve million, six hundred forty-one thousand, six hundred forty-four".