12768865 has 8 divisors (see below), whose sum is σ = 15343848. Its totient is φ = 10200960.

The previous prime is 12768857. The next prime is 12768881. The reversal of 12768865 is 56886721.

It can be written as a sum of positive squares in 4 ways, for example, as 2193361 + 10575504 = 1481^2 + 3252^2 .

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

It is not a de Polignac number, because 12768865 - 2³ = 12768857 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 3805 + ... + 6325.

It is an arithmetic number, because the mean of its divisors is an integer number (1917981).

Almost surely, 2^12768865 is an apocalyptic number.

It is an amenable number.

12768865 is a deficient number, since it is larger than the sum of its proper divisors (2574983).

12768865 is a wasteful number, since it uses less digits than its factorization.

12768865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539.

The product of its digits is 161280, while the sum is 43.

The square root of 12768865 is about 3573.3548662287. The cubic root of 12768865 is about 233.7315998747.

The spelling of 12768865 in words is "twelve million, seven hundred sixty-eight thousand, eight hundred sixty-five".