12857420 has 12 divisors (see below), whose sum is σ = 27000624. Its totient is φ = 5142960.

The previous prime is 12857413. The next prime is 12857431. The reversal of 12857420 is 2475821.

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, 321416 + ... + 321455.

It is an arithmetic number, because the mean of its divisors is an integer number (2250052).

Almost surely, 2^12857420 is an apocalyptic number.

12857420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12857420 is an abundant number, since it is smaller than the sum of its proper divisors (14143204).

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

12857420 is a wasteful number, since it uses less digits than its factorization.

12857420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642880 (or 642878 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 12857420 is about 3585.7244735200. The cubic root of 12857420 is about 234.2706829398.

The spelling of 12857420 in words is "twelve million, eight hundred fifty-seven thousand, four hundred twenty".