13407857 has 4 divisors (see below), whose sum is σ = 13421556. Its totient is φ = 13394160.

The previous prime is 13407847. The next prime is 13407859. The reversal of 13407857 is 75870431.

13407857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4669921 + 8737936 = 2161^2 + 2956^2 .

It is a cyclic number.

It is not a de Polignac number, because 13407857 - 2⁸ = 13407601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13407859) 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, 5258 + ... + 7379.

It is an arithmetic number, because the mean of its divisors is an integer number (3355389).

Almost surely, 2^13407857 is an apocalyptic number.

It is an amenable number.

13407857 is a deficient number, since it is larger than the sum of its proper divisors (13699).

13407857 is a wasteful number, since it uses less digits than its factorization.

13407857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13698.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 13407857 is about 3661.6740706950. The cubic root of 13407857 is about 237.5671876393.

The spelling of 13407857 in words is "thirteen million, four hundred seven thousand, eight hundred fifty-seven".