12790665 has 12 divisors (see below), whose sum is σ = 22170564. Its totient is φ = 6821664.

The previous prime is 12790639. The next prime is 12790699. The reversal of 12790665 is 56609721.

It can be written as a sum of positive squares in 2 ways, for example, as 4076361 + 8714304 = 2019^2 + 2952^2 .

It is not a de Polignac number, because 12790665 - 2⁶ = 12790601 is a prime.

It is a super-2 number, since 2×12790665² = 327202222284450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142074 + ... + 142163.

It is an arithmetic number, because the mean of its divisors is an integer number (1847547).

Almost surely, 2^12790665 is an apocalyptic number.

12790665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12790665 is a deficient number, since it is larger than the sum of its proper divisors (9379899).

12790665 is a wasteful number, since it uses less digits than its factorization.

12790665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284248 (or 284245 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 12790665 is about 3576.4039201410. The cubic root of 12790665 is about 233.8645391740.

The spelling of 12790665 in words is "twelve million, seven hundred ninety thousand, six hundred sixty-five".