8457859 has 4 divisors (see below), whose sum is σ = 8825616. Its totient is φ = 8090104.

The previous prime is 8457851. The next prime is 8457863. The reversal of 8457859 is 9587548.

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

It is a cyclic number.

It is not a de Polignac number, because 8457859 - 2³ = 8457851 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8457851) 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, 183844 + ... + 183889.

It is an arithmetic number, because the mean of its divisors is an integer number (2206404).

Almost surely, 2^8457859 is an apocalyptic number.

8457859 is a deficient number, since it is larger than the sum of its proper divisors (367757).

8457859 is a wasteful number, since it uses less digits than its factorization.

8457859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367756.

The product of its digits is 403200, while the sum is 46.

The square root of 8457859 is about 2908.2398456799. The cubic root of 8457859 is about 203.7449314358.

It can be divided in two parts, 8457 and 859, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 8457859 in words is "eight million, four hundred fifty-seven thousand, eight hundred fifty-nine".