12865144 has 32 divisors (see below), whose sum is σ = 25154640. Its totient is φ = 6163200.

The previous prime is 12865133. The next prime is 12865157. The reversal of 12865144 is 44156821.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 19687 + ... + 20329.

Almost surely, 2^12865144 is an apocalyptic number.

It is an amenable number.

12865144 is a deficient number, since it is larger than the sum of its proper divisors (12289496).

12865144 is a wasteful number, since it uses less digits than its factorization.

12865144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 747 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 12865144 is about 3586.8013605440. The cubic root of 12865144 is about 234.3175856757.

It can be divided in two parts, 1286 and 5144, that multiplied together give a square (6615184 = 2572²).

The spelling of 12865144 in words is "twelve million, eight hundred sixty-five thousand, one hundred forty-four".