12747857 has 4 divisors (see below), whose sum is σ = 13019136. Its totient is φ = 12476580.

The previous prime is 12747853. The next prime is 12747863. The reversal of 12747857 is 75874721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12747857 - 2² = 12747853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12747853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135569 + ... + 135662.

It is an arithmetic number, because the mean of its divisors is an integer number (3254784).

Almost surely, 2^12747857 is an apocalyptic number.

It is an amenable number.

12747857 is a deficient number, since it is larger than the sum of its proper divisors (271279).

12747857 is an equidigital number, since it uses as much as digits as its factorization.

12747857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271278.

The product of its digits is 109760, while the sum is 41.

The square root of 12747857 is about 3570.4141216391. The cubic root of 12747857 is about 233.6033470563.

The spelling of 12747857 in words is "twelve million, seven hundred forty-seven thousand, eight hundred fifty-seven".