12639494 has 8 divisors (see below), whose sum is σ = 21667728. Its totient is φ = 5416920.

The previous prime is 12639481. The next prime is 12639527. The reversal of 12639494 is 49493621.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451397 + ... + 451424.

It is an arithmetic number, because the mean of its divisors is an integer number (2708466).

Almost surely, 2^12639494 is an apocalyptic number.

12639494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12639494 is a deficient number, since it is larger than the sum of its proper divisors (9028234).

12639494 is an equidigital number, since it uses as much as digits as its factorization.

12639494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902830.

The product of its digits is 46656, while the sum is 38.

The square root of 12639494 is about 3555.2066044043. The cubic root of 12639494 is about 232.9395485016.

The spelling of 12639494 in words is "twelve million, six hundred thirty-nine thousand, four hundred ninety-four".