12799815 has 32 divisors (see below), whose sum is σ = 23600640. Its totient is φ = 5802624.

The previous prime is 12799811. The next prime is 12799819. The reversal of 12799815 is 51899721.

It is an interprime number because it is at equal distance from previous prime (12799811) and next prime (12799819).

It is not a de Polignac number, because 12799815 - 2² = 12799811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12799811) 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 31 ways as a sum of consecutive naturals, for example, 14157 + ... + 15033.

It is an arithmetic number, because the mean of its divisors is an integer number (737520).

Almost surely, 2^12799815 is an apocalyptic number.

12799815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12799815 is a deficient number, since it is larger than the sum of its proper divisors (10800825).

12799815 is a wasteful number, since it uses less digits than its factorization.

12799815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031.

The product of its digits is 45360, while the sum is 42.

The square root of 12799815 is about 3577.6829093703. The cubic root of 12799815 is about 233.9202920864.

The spelling of 12799815 in words is "twelve million, seven hundred ninety-nine thousand, eight hundred fifteen".