12740665 has 16 divisors (see below), whose sum is σ = 17543808. Its totient is φ = 8701056.

The previous prime is 12740641. The next prime is 12740671. The reversal of 12740665 is 56604721.

It is a happy number.

It is not a de Polignac number, because 12740665 - 2⁹ = 12740153 is a prime.

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, 10374 + ... + 11536.

It is an arithmetic number, because the mean of its divisors is an integer number (1096488).

Almost surely, 2^12740665 is an apocalyptic number.

It is an amenable number.

12740665 is a deficient number, since it is larger than the sum of its proper divisors (4803143).

12740665 is a wasteful number, since it uses less digits than its factorization.

12740665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 12740665 is about 3569.4068134635. The cubic root of 12740665 is about 233.5594078718.

The spelling of 12740665 in words is "twelve million, seven hundred forty thousand, six hundred sixty-five".