12515999 has 2 divisors, whose sum is σ = 12516000. Its totient is φ = 12515998.

The previous prime is 12515963. The next prime is 12516011. The reversal of 12515999 is 99951521.

It is a strong prime.

It is an emirp because it is prime and its reverse (99951521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12515999 - 2⁸ = 12515743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12515929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6257999 + 6258000.

It is an arithmetic number, because the mean of its divisors is an integer number (6258000).

Almost surely, 2^12515999 is an apocalyptic number.

12515999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12515999 is an equidigital number, since it uses as much as digits as its factorization.

12515999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36450, while the sum is 41.

The square root of 12515999 is about 3537.7957826873. The cubic root of 12515999 is about 232.1784138402.

The spelling of 12515999 in words is "twelve million, five hundred fifteen thousand, nine hundred ninety-nine".