12808765 has 4 divisors (see below), whose sum is σ = 15370524. Its totient is φ = 10247008.

The previous prime is 12808751. The next prime is 12808777. The reversal of 12808765 is 56780821.

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 3916441 + 8892324 = 1979^2 + 2982^2 .

It is a cyclic number.

It is not a de Polignac number, because 12808765 - 2⁷ = 12808637 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280872 + ... + 1280881.

It is an arithmetic number, because the mean of its divisors is an integer number (3842631).

Almost surely, 2^12808765 is an apocalyptic number.

It is an amenable number.

12808765 is a deficient number, since it is larger than the sum of its proper divisors (2561759).

12808765 is an equidigital number, since it uses as much as digits as its factorization.

12808765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561758.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 12808765 is about 3578.9335003601. The cubic root of 12808765 is about 233.9748006565.

The spelling of 12808765 in words is "twelve million, eight hundred eight thousand, seven hundred sixty-five".