12866872 has 8 divisors (see below), whose sum is σ = 24125400. Its totient is φ = 6433432.

The previous prime is 12866869. The next prime is 12866873. The reversal of 12866872 is 27866821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12866873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804172 + ... + 804187.

It is an arithmetic number, because the mean of its divisors is an integer number (3015675).

Almost surely, 2^12866872 is an apocalyptic number.

It is an amenable number.

12866872 is a deficient number, since it is larger than the sum of its proper divisors (11258528).

12866872 is a wasteful number, since it uses less digits than its factorization.

12866872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608365 (or 1608361 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 12866872 is about 3587.0422356030. The cubic root of 12866872 is about 234.3280761053.

The spelling of 12866872 in words is "twelve million, eight hundred sixty-six thousand, eight hundred seventy-two".