12639459 has 16 divisors (see below), whose sum is σ = 19781888. Its totient is φ = 7026912.

The previous prime is 12639457. The next prime is 12639461. The reversal of 12639459 is 95493621.

12639459 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12639457) and next prime (12639461).

It is not a de Polignac number, because 12639459 - 2¹ = 12639457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12639457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7357 + ... + 8910.

It is an arithmetic number, because the mean of its divisors is an integer number (1236368).

Almost surely, 2^12639459 is an apocalyptic number.

12639459 is a deficient number, since it is larger than the sum of its proper divisors (7142429).

12639459 is a wasteful number, since it uses less digits than its factorization.

12639459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16314.

The product of its digits is 58320, while the sum is 39.

The square root of 12639459 is about 3555.2016820428. The cubic root of 12639459 is about 232.9393334906.

The spelling of 12639459 in words is "twelve million, six hundred thirty-nine thousand, four hundred fifty-nine".