12665995 has 4 divisors (see below), whose sum is σ = 15199200. Its totient is φ = 10132792.

The previous prime is 12665987. The next prime is 12666019. The reversal of 12665995 is 59956621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12665995 - 2³ = 12665987 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266595 + ... + 1266604.

It is an arithmetic number, because the mean of its divisors is an integer number (3799800).

Almost surely, 2^12665995 is an apocalyptic number.

12665995 is a deficient number, since it is larger than the sum of its proper divisors (2533205).

12665995 is an equidigital number, since it uses as much as digits as its factorization.

12665995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533204.

The product of its digits is 145800, while the sum is 43.

The square root of 12665995 is about 3558.9317217390. The cubic root of 12665995 is about 233.1022349095.

The spelling of 12665995 in words is "twelve million, six hundred sixty-five thousand, nine hundred ninety-five".