857163 has 4 divisors (see below), whose sum is σ = 1142888. Its totient is φ = 571440.

The previous prime is 857161. The next prime is 857167. The reversal of 857163 is 361758.

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

It is not a de Polignac number, because 857163 - 2¹ = 857161 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 857163.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 857163.

It is not an unprimeable number, because it can be changed into a prime (857161) 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, 142858 + ... + 142863.

It is an arithmetic number, because the mean of its divisors is an integer number (285722).

857163 is a Friedman number, since it can be written as 51*7^(8-3)+6, using all its digits and the basic arithmetic operations.

2⁸⁵⁷¹⁶³ is an apocalyptic number.

857163 is a deficient number, since it is larger than the sum of its proper divisors (285725).

857163 is a wasteful number, since it uses less digits than its factorization.

857163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285724.

The product of its digits is 5040, while the sum is 30.

The square root of 857163 is about 925.8309780948. The cubic root of 857163 is about 94.9921692530.

The spelling of 857163 in words is "eight hundred fifty-seven thousand, one hundred sixty-three".