12857942 has 4 divisors (see below), whose sum is σ = 19286916. Its totient is φ = 6428970.

The previous prime is 12857941. The next prime is 12857951. The reversal of 12857942 is 24975821.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 12857896 and 12857905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3214484 + ... + 3214487.

It is an arithmetic number, because the mean of its divisors is an integer number (4821729).

Almost surely, 2^12857942 is an apocalyptic number.

12857942 is a deficient number, since it is larger than the sum of its proper divisors (6428974).

12857942 is an equidigital number, since it uses as much as digits as its factorization.

12857942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6428973.

The product of its digits is 40320, while the sum is 38.

The square root of 12857942 is about 3585.7972614190. The cubic root of 12857942 is about 234.2738532918.

The spelling of 12857942 in words is "twelve million, eight hundred fifty-seven thousand, nine hundred forty-two".