12639249 has 24 divisors (see below), whose sum is σ = 20958080. Its totient is φ = 7190208.

The previous prime is 12639247. The next prime is 12639257. The reversal of 12639249 is 94293621.

12639249 is a `hidden beast` number, since 12 + 639 + 2 + 4 + 9 = 666.

It is not a de Polignac number, because 12639249 - 2¹ = 12639247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12639247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27429 + ... + 27885.

Almost surely, 2^12639249 is an apocalyptic number.

It is an amenable number.

12639249 is a deficient number, since it is larger than the sum of its proper divisors (8318831).

12639249 is a wasteful number, since it uses less digits than its factorization.

12639249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 906 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 12639249 is about 3555.1721477307. The cubic root of 12639249 is about 232.9380434161.

The spelling of 12639249 in words is "twelve million, six hundred thirty-nine thousand, two hundred forty-nine".