12645579 has 4 divisors (see below), whose sum is σ = 16860776. Its totient is φ = 8430384.

The previous prime is 12645547. The next prime is 12645623. The reversal of 12645579 is 97554621.

12645579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12645579 - 2⁵ = 12645547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12645509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2107594 + ... + 2107599.

It is an arithmetic number, because the mean of its divisors is an integer number (4215194).

Almost surely, 2^12645579 is an apocalyptic number.

12645579 is a deficient number, since it is larger than the sum of its proper divisors (4215197).

12645579 is an equidigital number, since it uses as much as digits as its factorization.

12645579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215196.

The product of its digits is 75600, while the sum is 39.

The square root of 12645579 is about 3556.0622885433. The cubic root of 12645579 is about 232.9769236726.

The spelling of 12645579 in words is "twelve million, six hundred forty-five thousand, five hundred seventy-nine".