12817885 has 8 divisors (see below), whose sum is σ = 15492960. Its totient is φ = 10179984.

The previous prime is 12817867. The next prime is 12817897. The reversal of 12817885 is 58871821.

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 12817885 - 2⁵ = 12817853 is a prime.

It is a congruent number.

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, 8527 + ... + 9916.

It is an arithmetic number, because the mean of its divisors is an integer number (1936620).

Almost surely, 2^12817885 is an apocalyptic number.

It is an amenable number.

12817885 is a deficient number, since it is larger than the sum of its proper divisors (2675075).

12817885 is a wasteful number, since it uses less digits than its factorization.

12817885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18587.

The product of its digits is 35840, while the sum is 40.

The square root of 12817885 is about 3580.2073962272. The cubic root of 12817885 is about 234.0303184716.

The spelling of 12817885 in words is "twelve million, eight hundred seventeen thousand, eight hundred eighty-five".