12639544 has 16 divisors (see below), whose sum is σ = 23935320. Its totient is φ = 6256800.

The previous prime is 12639527. The next prime is 12639547. The reversal of 12639544 is 44593621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12639547) 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 in 3 ways as a sum of consecutive naturals, for example, 7014 + ... + 8629.

Almost surely, 2^12639544 is an apocalyptic number.

It is an amenable number.

12639544 is a deficient number, since it is larger than the sum of its proper divisors (11295776).

12639544 is a wasteful number, since it uses less digits than its factorization.

12639544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15750 (or 15746 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 12639544 is about 3555.2136363375. The cubic root of 12639544 is about 232.9398556595.

The spelling of 12639544 in words is "twelve million, six hundred thirty-nine thousand, five hundred forty-four".