12865444 has 12 divisors (see below), whose sum is σ = 23291100. Its totient is φ = 6210848.

The previous prime is 12865439. The next prime is 12865469. The reversal of 12865444 is 44456821.

It can be written as a sum of positive squares in 2 ways, for example, as 8294400 + 4571044 = 2880^2 + 2138^2 .

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, 55339 + ... + 55570.

It is an arithmetic number, because the mean of its divisors is an integer number (1940925).

Almost surely, 2^12865444 is an apocalyptic number.

It is an amenable number.

12865444 is a deficient number, since it is larger than the sum of its proper divisors (10425656).

12865444 is a wasteful number, since it uses less digits than its factorization.

12865444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110942 (or 110940 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 12865444 is about 3586.8431802910. The cubic root of 12865444 is about 234.3194069983.

The spelling of 12865444 in words is "twelve million, eight hundred sixty-five thousand, four hundred forty-four".