856001 has 8 divisors (see below), whose sum is σ = 928224. Its totient is φ = 786240.

The previous prime is 855997. The next prime is 856021. The reversal of 856001 is 100658.

856001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 856001 - 2² = 855997 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 856001.

It is not an unprimeable number, because it can be changed into a prime (856021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146 + ... + 1316.

It is an arithmetic number, because the mean of its divisors is an integer number (116028).

2⁸⁵⁶⁰⁰¹ is an apocalyptic number.

It is an amenable number.

856001 is a deficient number, since it is larger than the sum of its proper divisors (72223).

856001 is a wasteful number, since it uses less digits than its factorization.

856001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 856001 is about 925.2032209196. The cubic root of 856001 is about 94.9492249444.

Adding to 856001 its reverse (100658), we get a palindrome (956659).

The spelling of 856001 in words is "eight hundred fifty-six thousand, one".