856006 has 4 divisors (see below), whose sum is σ = 1284012. Its totient is φ = 428002.

The previous prime is 855997. The next prime is 856021. The reversal of 856006 is 600658.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214000 + ... + 214003.

It is an arithmetic number, because the mean of its divisors is an integer number (321003).

2⁸⁵⁶⁰⁰⁶ is an apocalyptic number.

856006 is a deficient number, since it is larger than the sum of its proper divisors (428006).

856006 is a wasteful number, since it uses less digits than its factorization.

856006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428005.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 856006 is about 925.2059230247. The cubic root of 856006 is about 94.9494098138.

The spelling of 856006 in words is "eight hundred fifty-six thousand, six".