12612665 has 16 divisors (see below), whose sum is σ = 16571856. Its totient is φ = 9158400.

The previous prime is 12612571. The next prime is 12612679. The reversal of 12612665 is 56621621.

It can be written as a sum of positive squares in 8 ways, for example, as 6775609 + 5837056 = 2603^2 + 2416^2 .

It is not a de Polignac number, because 12612665 - 2¹² = 12608569 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 2375 + ... + 5555.

It is an arithmetic number, because the mean of its divisors is an integer number (1035741).

Almost surely, 2^12612665 is an apocalyptic number.

It is an amenable number.

12612665 is a deficient number, since it is larger than the sum of its proper divisors (3959191).

12612665 is a wasteful number, since it uses less digits than its factorization.

12612665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260.

The product of its digits is 4320, while the sum is 29.

The square root of 12612665 is about 3551.4314015619. The cubic root of 12612665 is about 232.7746167358.

The spelling of 12612665 in words is "twelve million, six hundred twelve thousand, six hundred sixty-five".