12517668 has 36 divisors (see below), whose sum is σ = 31752448. Its totient is φ = 4158000.

The previous prime is 12517667. The next prime is 12517679. The reversal of 12517668 is 86671521.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12517667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16293 + ... + 17043.

Almost surely, 2^12517668 is an apocalyptic number.

12517668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12517668 is an abundant number, since it is smaller than the sum of its proper divisors (19234780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12517668 is a wasteful number, since it uses less digits than its factorization.

12517668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224 (or 1219 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 12517668 is about 3538.0316561614. The cubic root of 12517668 is about 232.1887336596.

The spelling of 12517668 in words is "twelve million, five hundred seventeen thousand, six hundred sixty-eight".