12865172 has 12 divisors (see below), whose sum is σ = 22540980. Its totient is φ = 6424896.

The previous prime is 12865157. The next prime is 12865189. The reversal of 12865172 is 27156821.

It can be written as a sum of positive squares in 2 ways, for example, as 12630916 + 234256 = 3554^2 + 484^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3608 + ... + 6224.

It is an arithmetic number, because the mean of its divisors is an integer number (1878415).

Almost surely, 2^12865172 is an apocalyptic number.

It is an amenable number.

12865172 is a deficient number, since it is larger than the sum of its proper divisors (9675808).

12865172 is a wasteful number, since it uses less digits than its factorization.

12865172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850 (or 3848 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 12865172 is about 3586.8052637410. The cubic root of 12865172 is about 234.3177556670.

The spelling of 12865172 in words is "twelve million, eight hundred sixty-five thousand, one hundred seventy-two".