12691115 has 16 divisors (see below), whose sum is σ = 15730848. Its totient is φ = 9824256.

The previous prime is 12691109. The next prime is 12691169. The reversal of 12691115 is 51119621.

12691115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12691115 - 2⁸ = 12690859 is a prime.

It is a super-2 number, since 2×12691115² = 322128799886450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21707 + ... + 22283.

It is an arithmetic number, because the mean of its divisors is an integer number (983178).

Almost surely, 2^12691115 is an apocalyptic number.

12691115 is a deficient number, since it is larger than the sum of its proper divisors (3039733).

12691115 is an equidigital number, since it uses as much as digits as its factorization.

12691115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718.

The product of its digits is 540, while the sum is 26.

The square root of 12691115 is about 3562.4591225725. The cubic root of 12691115 is about 233.2562341645.

The spelling of 12691115 in words is "twelve million, six hundred ninety-one thousand, one hundred fifteen".