12515663 has 2 divisors, whose sum is σ = 12515664. Its totient is φ = 12515662.

The previous prime is 12515651. The next prime is 12515669. The reversal of 12515663 is 36651521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12515663 - 2⁴ = 12515647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12515669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6257831 + 6257832.

It is an arithmetic number, because the mean of its divisors is an integer number (6257832).

Almost surely, 2^12515663 is an apocalyptic number.

12515663 is a deficient number, since it is larger than the sum of its proper divisors (1).

12515663 is an equidigital number, since it uses as much as digits as its factorization.

12515663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 12515663 is about 3537.7482951731. The cubic root of 12515663 is about 232.1763361622.

The spelling of 12515663 in words is "twelve million, five hundred fifteen thousand, six hundred sixty-three".