12857442 has 16 divisors (see below), whose sum is σ = 27693120. Its totient is φ = 3956112.

The previous prime is 12857431. The next prime is 12857443. The reversal of 12857442 is 24475821.

It is not an unprimeable number, because it can be changed into a prime (12857443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82342 + ... + 82497.

It is an arithmetic number, because the mean of its divisors is an integer number (1730820).

Almost surely, 2^12857442 is an apocalyptic number.

12857442 is an abundant number, since it is smaller than the sum of its proper divisors (14835678).

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

12857442 is a wasteful number, since it uses less digits than its factorization.

12857442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164857.

The product of its digits is 17920, while the sum is 33.

The square root of 12857442 is about 3585.7275412390. The cubic root of 12857442 is about 234.2708165579.

The spelling of 12857442 in words is "twelve million, eight hundred fifty-seven thousand, four hundred forty-two".