12859639 has 8 divisors (see below), whose sum is σ = 13959680. Its totient is φ = 11775456.

The previous prime is 12859631. The next prime is 12859643. The reversal of 12859639 is 93695821.

It is a happy number.

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 12859639 - 2³ = 12859631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12859595 and 12859604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12859631) 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, 2244 + ... + 5545.

It is an arithmetic number, because the mean of its divisors is an integer number (1744960).

Almost surely, 2^12859639 is an apocalyptic number.

12859639 is a deficient number, since it is larger than the sum of its proper divisors (1100041).

12859639 is a wasteful number, since it uses less digits than its factorization.

12859639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7929.

The product of its digits is 116640, while the sum is 43.

The square root of 12859639 is about 3586.0338816023. The cubic root of 12859639 is about 234.2841593796.

The spelling of 12859639 in words is "twelve million, eight hundred fifty-nine thousand, six hundred thirty-nine".