12857166 has 48 divisors (see below), whose sum is σ = 32333184. Its totient is φ = 3616272.

The previous prime is 12857147. The next prime is 12857209. The reversal of 12857166 is 66175821.

12857166 is a `hidden beast` number, since 1 + 28 + 571 + 66 = 666.

12857166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12857166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7681 + ... + 9203.

It is an arithmetic number, because the mean of its divisors is an integer number (673608).

Almost surely, 2^12857166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12857166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16166592).

12857166 is an abundant number, since it is smaller than the sum of its proper divisors (19476018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12857166 is a wasteful number, since it uses less digits than its factorization.

12857166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605 (or 1602 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 12857166 is about 3585.6890551190. The cubic root of 12857166 is about 234.2691402470.

The spelling of 12857166 in words is "twelve million, eight hundred fifty-seven thousand, one hundred sixty-six".