12515998 has 12 divisors (see below), whose sum is σ = 20636280. Its totient is φ = 5688980.

The previous prime is 12515963. The next prime is 12515999. The reversal of 12515998 is 89951521.

It is a self number, because there is not a number n which added to its sum of digits gives 12515998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515999) 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 in 5 ways as a sum of consecutive naturals, for example, 25618 + ... + 26101.

It is an arithmetic number, because the mean of its divisors is an integer number (1719690).

Almost surely, 2^12515998 is an apocalyptic number.

12515998 is a deficient number, since it is larger than the sum of its proper divisors (8120282).

12515998 is a wasteful number, since it uses less digits than its factorization.

12515998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51743 (or 51732 counting only the distinct ones).

The product of its digits is 32400, while the sum is 40.

The square root of 12515998 is about 3537.7956413564. The cubic root of 12515998 is about 232.1784076566.

The spelling of 12515998 in words is "twelve million, five hundred fifteen thousand, nine hundred ninety-eight".