12686216 has 16 divisors (see below), whose sum is σ = 25186140. Its totient is φ = 5969920.

The previous prime is 12686213. The next prime is 12686251. The reversal of 12686216 is 61268621.

It can be written as a sum of positive squares in 2 ways, for example, as 9897316 + 2788900 = 3146^2 + 1670^2 .

It is not an unprimeable number, because it can be changed into a prime (12686213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46505 + ... + 46776.

Almost surely, 2^12686216 is an apocalyptic number.

It is an amenable number.

12686216 is a deficient number, since it is larger than the sum of its proper divisors (12499924).

12686216 is a wasteful number, since it uses less digits than its factorization.

12686216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93304 (or 93300 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 12686216 is about 3561.7714693675. The cubic root of 12686216 is about 233.2262165929.

The spelling of 12686216 in words is "twelve million, six hundred eighty-six thousand, two hundred sixteen".