856355 has 4 divisors (see below), whose sum is σ = 1027632. Its totient is φ = 685080.

The previous prime is 856351. The next prime is 856369. The reversal of 856355 is 553658.

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

It is not a de Polignac number, because 856355 - 2² = 856351 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 (856351) 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, 85631 + ... + 85640.

It is an arithmetic number, because the mean of its divisors is an integer number (256908).

2⁸⁵⁶³⁵⁵ is an apocalyptic number.

856355 is a deficient number, since it is larger than the sum of its proper divisors (171277).

856355 is a wasteful number, since it uses less digits than its factorization.

856355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171276.

The product of its digits is 18000, while the sum is 32.

The square root of 856355 is about 925.3945104657. The cubic root of 856355 is about 94.9623119203.

The spelling of 856355 in words is "eight hundred fifty-six thousand, three hundred fifty-five".