12800815 has 12 divisors (see below), whose sum is σ = 15755112. Its totient is φ = 9984320.

The previous prime is 12800797. The next prime is 12800831. The reversal of 12800815 is 51800821.

It is not a de Polignac number, because 12800815 - 2⁵ = 12800783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12800815.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7644 + ... + 9166.

It is an arithmetic number, because the mean of its divisors is an integer number (1312926).

Almost surely, 2^12800815 is an apocalyptic number.

12800815 is a deficient number, since it is larger than the sum of its proper divisors (2954297).

12800815 is an equidigital number, since it uses as much as digits as its factorization.

12800815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 12800815 is about 3577.8226618993. The cubic root of 12800815 is about 233.9263836901.

The spelling of 12800815 in words is "twelve million, eight hundred thousand, eight hundred fifteen".