13456857 has 4 divisors (see below), whose sum is σ = 17942480. Its totient is φ = 8971236.

The previous prime is 13456853. The next prime is 13456867. The reversal of 13456857 is 75865431.

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 not a de Polignac number, because 13456857 - 2² = 13456853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13456853) 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, 2242807 + ... + 2242812.

It is an arithmetic number, because the mean of its divisors is an integer number (4485620).

Almost surely, 2^13456857 is an apocalyptic number.

It is an amenable number.

13456857 is a deficient number, since it is larger than the sum of its proper divisors (4485623).

13456857 is an equidigital number, since it uses as much as digits as its factorization.

13456857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4485622.

The product of its digits is 100800, while the sum is 39.

The square root of 13456857 is about 3668.3588973818. The cubic root of 13456857 is about 237.8562380622.

The spelling of 13456857 in words is "thirteen million, four hundred fifty-six thousand, eight hundred fifty-seven".