856158 has 16 divisors (see below), whose sum is σ = 1767936. Its totient is φ = 276120.

The previous prime is 856153. The next prime is 856169. The reversal of 856158 is 851658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856153) 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, 2116 + ... + 2487.

It is an arithmetic number, because the mean of its divisors is an integer number (110496).

2⁸⁵⁶¹⁵⁸ is an apocalyptic number.

856158 is an abundant number, since it is smaller than the sum of its proper divisors (911778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856158 is a wasteful number, since it uses less digits than its factorization.

856158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4639.

The product of its digits is 9600, while the sum is 33.

The square root of 856158 is about 925.2880632538. The cubic root of 856158 is about 94.9550295004.

The spelling of 856158 in words is "eight hundred fifty-six thousand, one hundred fifty-eight".