12665515 has 16 divisors (see below), whose sum is σ = 16079616. Its totient is φ = 9561600.

The previous prime is 12665509. The next prime is 12665531. The reversal of 12665515 is 51556621.

It is not a de Polignac number, because 12665515 - 2¹¹ = 12663467 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 5359 + ... + 7351.

It is an arithmetic number, because the mean of its divisors is an integer number (1004976).

Almost surely, 2^12665515 is an apocalyptic number.

12665515 is a deficient number, since it is larger than the sum of its proper divisors (3414101).

12665515 is a wasteful number, since it uses less digits than its factorization.

12665515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070.

The product of its digits is 9000, while the sum is 31.

The square root of 12665515 is about 3558.8642851337. The cubic root of 12665515 is about 233.0992902668.

The spelling of 12665515 in words is "twelve million, six hundred sixty-five thousand, five hundred fifteen".