12815867 has 2 divisors, whose sum is σ = 12815868. Its totient is φ = 12815866.

The previous prime is 12815857. The next prime is 12815923. The reversal of 12815867 is 76851821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12815867 - 2⁴ = 12815851 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12815867.

It is not a weakly prime, because it can be changed into another prime (12815837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6407933 + 6407934.

It is an arithmetic number, because the mean of its divisors is an integer number (6407934).

Almost surely, 2^12815867 is an apocalyptic number.

12815867 is a deficient number, since it is larger than the sum of its proper divisors (1).

12815867 is an equidigital number, since it uses as much as digits as its factorization.

12815867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 38.

The square root of 12815867 is about 3579.9255578852. The cubic root of 12815867 is about 234.0180362069.

The spelling of 12815867 in words is "twelve million, eight hundred fifteen thousand, eight hundred sixty-seven".