12639807 has 40 divisors (see below), whose sum is σ = 20444160. Its totient is φ = 7756560.

The previous prime is 12639793. The next prime is 12639817. The reversal of 12639807 is 70893621.

12639807 is a `hidden beast` number, since 12 + 639 + 8 + 0 + 7 = 666.

It is not a de Polignac number, because 12639807 - 2⁴ = 12639791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12639817) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 66082 + ... + 66272.

It is an arithmetic number, because the mean of its divisors is an integer number (511104).

Almost surely, 2^12639807 is an apocalyptic number.

12639807 is a deficient number, since it is larger than the sum of its proper divisors (7804353).

12639807 is a wasteful number, since it uses less digits than its factorization.

12639807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 12639807 is about 3555.2506240770. The cubic root of 12639807 is about 232.9414712968.

The spelling of 12639807 in words is "twelve million, six hundred thirty-nine thousand, eight hundred seven".