12715665 has 16 divisors (see below), whose sum is σ = 21230208. Its totient is φ = 6486656.

The previous prime is 12715649. The next prime is 12715667. The reversal of 12715665 is 56651721.

It is a cyclic number.

It is not a de Polignac number, because 12715665 - 2⁴ = 12715649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12715667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18084 + ... + 18773.

It is an arithmetic number, because the mean of its divisors is an integer number (1326888).

Almost surely, 2^12715665 is an apocalyptic number.

12715665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12715665 is a deficient number, since it is larger than the sum of its proper divisors (8514543).

12715665 is a wasteful number, since it uses less digits than its factorization.

12715665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36888.

The product of its digits is 12600, while the sum is 33.

The square root of 12715665 is about 3565.9031114151. The cubic root of 12715665 is about 233.4065427874.

The spelling of 12715665 in words is "twelve million, seven hundred fifteen thousand, six hundred sixty-five".