12644615 has 4 divisors (see below), whose sum is σ = 15173544. Its totient is φ = 10115688.

The previous prime is 12644591. The next prime is 12644669. The reversal of 12644615 is 51644621.

12644615 is digitally balanced in base 3, 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 a cyclic number.

It is not a de Polignac number, because 12644615 - 2¹⁶ = 12579079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264457 + ... + 1264466.

It is an arithmetic number, because the mean of its divisors is an integer number (3793386).

Almost surely, 2^12644615 is an apocalyptic number.

12644615 is a deficient number, since it is larger than the sum of its proper divisors (2528929).

12644615 is an equidigital number, since it uses as much as digits as its factorization.

12644615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528928.

The product of its digits is 5760, while the sum is 29.

The square root of 12644615 is about 3555.9267427775. The cubic root of 12644615 is about 232.9710034096.

The spelling of 12644615 in words is "twelve million, six hundred forty-four thousand, six hundred fifteen".