12920965 has 8 divisors (see below), whose sum is σ = 15538680. Its totient is φ = 10314432.

The previous prime is 12920951. The next prime is 12920977. The reversal of 12920965 is 56902921.

It can be written as a sum of positive squares in 4 ways, for example, as 6640929 + 6280036 = 2577^2 + 2506^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12920965 - 2⁵ = 12920933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12920965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7 + ... + 5083.

It is an arithmetic number, because the mean of its divisors is an integer number (1942335).

Almost surely, 2^12920965 is an apocalyptic number.

It is an amenable number.

12920965 is a deficient number, since it is larger than the sum of its proper divisors (2617715).

12920965 is an equidigital number, since it uses as much as digits as its factorization.

12920965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5591.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 12920965 is about 3594.5743837066. The cubic root of 12920965 is about 234.6559928194.

The spelling of 12920965 in words is "twelve million, nine hundred twenty thousand, nine hundred sixty-five".