12865579 has 8 divisors (see below), whose sum is σ = 13468320. Its totient is φ = 12266496.

The previous prime is 12865553. The next prime is 12865613. The reversal of 12865579 is 97556821.

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

It is a 10-Lehmer number, since φ(12865579) divides (12865579-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 12865579 - 2¹⁵ = 12832811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12865519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8427 + ... + 9835.

It is an arithmetic number, because the mean of its divisors is an integer number (1683540).

Almost surely, 2^12865579 is an apocalyptic number.

12865579 is a deficient number, since it is larger than the sum of its proper divisors (602741).

12865579 is a wasteful number, since it uses less digits than its factorization.

12865579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829.

The product of its digits is 151200, while the sum is 43.

The square root of 12865579 is about 3586.8619990181. The cubic root of 12865579 is about 234.3202265842.

The spelling of 12865579 in words is "twelve million, eight hundred sixty-five thousand, five hundred seventy-nine".