12880815 has 16 divisors (see below), whose sum is σ = 21822048. Its totient is φ = 6465536.

The previous prime is 12880811. The next prime is 12880823. The reversal of 12880815 is 51808821.

It is a cyclic number.

It is not a de Polignac number, because 12880815 - 2² = 12880811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12880811) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 25002 + ... + 25511.

It is an arithmetic number, because the mean of its divisors is an integer number (1363878).

Almost surely, 2^12880815 is an apocalyptic number.

12880815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12880815 is a deficient number, since it is larger than the sum of its proper divisors (8941233).

12880815 is a wasteful number, since it uses less digits than its factorization.

12880815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50538.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 12880815 is about 3588.9852326250. The cubic root of 12880815 is about 234.4126876284.

It can be divided in two parts, 12880 and 815, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 12880815 in words is "twelve million, eight hundred eighty thousand, eight hundred fifteen".