12812765 has 32 divisors (see below), whose sum is σ = 18585600. Its totient is φ = 8467200.

The previous prime is 12812749. The next prime is 12812777. The reversal of 12812765 is 56721821.

12812765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12812765 - 2⁴ = 12812749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53045 + ... + 53285.

It is an arithmetic number, because the mean of its divisors is an integer number (580800).

Almost surely, 2^12812765 is an apocalyptic number.

It is an amenable number.

12812765 is a deficient number, since it is larger than the sum of its proper divisors (5772835).

12812765 is an equidigital number, since it uses as much as digits as its factorization.

With its predecessor (12812764) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (298).

12812765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 284 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 12812765 is about 3579.4922824334. The cubic root of 12812765 is about 233.9991538187. Note that the first 3 decimals are identical.

The spelling of 12812765 in words is "twelve million, eight hundred twelve thousand, seven hundred sixty-five".