12912565 has 8 divisors (see below), whose sum is σ = 15669720. Its totient is φ = 10213632.

The previous prime is 12912553. The next prime is 12912577. The reversal of 12912565 is 56521921.

12912565 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 (12912553) and next prime (12912577).

It can be written as a sum of positive squares in 4 ways, for example, as 2916 + 12909649 = 54^2 + 3593^2 .

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 12912565 - 2⁷ = 12912437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14064 + ... + 14953.

It is an arithmetic number, because the mean of its divisors is an integer number (1958715).

Almost surely, 2^12912565 is an apocalyptic number.

It is an amenable number.

12912565 is a deficient number, since it is larger than the sum of its proper divisors (2757155).

12912565 is an equidigital number, since it uses as much as digits as its factorization.

12912565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29111.

The product of its digits is 5400, while the sum is 31.

The square root of 12912565 is about 3593.4057661222. The cubic root of 12912565 is about 234.6051313541.

The spelling of 12912565 in words is "twelve million, nine hundred twelve thousand, five hundred sixty-five".