12686915 has 8 divisors (see below), whose sum is σ = 15886368. Its totient is φ = 9708160.

The previous prime is 12686911. The next prime is 12686923. The reversal of 12686915 is 51968621.

12686915 is nontrivially palindromic in base 4.

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

It is not a de Polignac number, because 12686915 - 2² = 12686911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12686911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55046 + ... + 55275.

It is an arithmetic number, because the mean of its divisors is an integer number (1985796).

Almost surely, 2^12686915 is an apocalyptic number.

12686915 is a deficient number, since it is larger than the sum of its proper divisors (3199453).

12686915 is a wasteful number, since it uses less digits than its factorization.

12686915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110349.

The product of its digits is 25920, while the sum is 38.

The square root of 12686915 is about 3561.8695933456. The cubic root of 12686915 is about 233.2305000380.

The spelling of 12686915 in words is "twelve million, six hundred eighty-six thousand, nine hundred fifteen".