12918985 has 8 divisors (see below), whose sum is σ = 16176960. Its totient is φ = 9885744.

The previous prime is 12918979. The next prime is 12918991. The reversal of 12918985 is 58981921.

It is an interprime number because it is at equal distance from previous prime (12918979) and next prime (12918991).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12918985 - 2⁹ = 12918473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56055 + ... + 56284.

It is an arithmetic number, because the mean of its divisors is an integer number (2022120).

Almost surely, 2^12918985 is an apocalyptic number.

It is an amenable number.

12918985 is a deficient number, since it is larger than the sum of its proper divisors (3257975).

12918985 is a wasteful number, since it uses less digits than its factorization.

12918985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112367.

The product of its digits is 51840, while the sum is 43.

The square root of 12918985 is about 3594.2989580724. The cubic root of 12918985 is about 234.6440060315.

The spelling of 12918985 in words is "twelve million, nine hundred eighteen thousand, nine hundred eighty-five".