856007 has 4 divisors (see below), whose sum is σ = 901080. Its totient is φ = 810936.

The previous prime is 855997. The next prime is 856021. The reversal of 856007 is 700658.

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 856007 - 2¹⁸ = 593863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856057) 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, 22508 + ... + 22545.

It is an arithmetic number, because the mean of its divisors is an integer number (225270).

2⁸⁵⁶⁰⁰⁷ is an apocalyptic number.

856007 is a deficient number, since it is larger than the sum of its proper divisors (45073).

856007 is a wasteful number, since it uses less digits than its factorization.

856007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45072.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 856007 is about 925.2064634448. The cubic root of 856007 is about 94.9494467876.

The spelling of 856007 in words is "eight hundred fifty-six thousand, seven".