12628765 has 4 divisors (see below), whose sum is σ = 15154524. Its totient is φ = 10103008.

The previous prime is 12628757. The next prime is 12628783. The reversal of 12628765 is 56782621.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6859161 + 5769604 = 2619^2 + 2402^2 .

It is a cyclic number.

It is not a de Polignac number, because 12628765 - 2³ = 12628757 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1262872 + ... + 1262881.

It is an arithmetic number, because the mean of its divisors is an integer number (3788631).

Almost surely, 2^12628765 is an apocalyptic number.

It is an amenable number.

12628765 is a deficient number, since it is larger than the sum of its proper divisors (2525759).

12628765 is an equidigital number, since it uses as much as digits as its factorization.

12628765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525758.

The product of its digits is 40320, while the sum is 37.

The square root of 12628765 is about 3553.6973703454. The cubic root of 12628765 is about 232.8736198102.

The spelling of 12628765 in words is "twelve million, six hundred twenty-eight thousand, seven hundred sixty-five".