12516817 has 8 divisors (see below), whose sum is σ = 12684672. Its totient is φ = 12350400.

The previous prime is 12516809. The next prime is 12516821. The reversal of 12516817 is 71861521.

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 12516817 - 2³ = 12516809 is a prime.

It is a super-2 number, since 2×12516817² = 313341415622978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12516857) 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 7 ways as a sum of consecutive naturals, for example, 40092 + ... + 40402.

It is an arithmetic number, because the mean of its divisors is an integer number (1585584).

Almost surely, 2^12516817 is an apocalyptic number.

It is an amenable number.

12516817 is a deficient number, since it is larger than the sum of its proper divisors (167855).

12516817 is a wasteful number, since it uses less digits than its factorization.

12516817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719.

The product of its digits is 3360, while the sum is 31.

The square root of 12516817 is about 3537.9113895065. The cubic root of 12516817 is about 232.1834718411.

The spelling of 12516817 in words is "twelve million, five hundred sixteen thousand, eight hundred seventeen".