12639131 has 8 divisors (see below), whose sum is σ = 12902400. Its totient is φ = 12378600.

The previous prime is 12639127. The next prime is 12639149. The reversal of 12639131 is 13193621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12639131 - 2² = 12639127 is a prime.

It is a super-2 number, since 2×12639131² = 319495264870322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12639131.

It is not an unprimeable number, because it can be changed into a prime (12639181) 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 7 ways as a sum of consecutive naturals, for example, 10406 + ... + 11556.

It is an arithmetic number, because the mean of its divisors is an integer number (1612800).

Almost surely, 2^12639131 is an apocalyptic number.

12639131 is a deficient number, since it is larger than the sum of its proper divisors (263269).

12639131 is a wasteful number, since it uses less digits than its factorization.

12639131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369.

The product of its digits is 972, while the sum is 26.

The square root of 12639131 is about 3555.1555521524. The cubic root of 12639131 is about 232.9373185108.

The spelling of 12639131 in words is "twelve million, six hundred thirty-nine thousand, one hundred thirty-one".