855879 has 8 divisors (see below), whose sum is σ = 1178112. Its totient is φ = 552120.

The previous prime is 855863. The next prime is 855887. The reversal of 855879 is 978558.

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

It is not a de Polignac number, because 855879 - 2⁴ = 855863 is a prime.

855879 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 855879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855889) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 4509 + ... + 4694.

It is an arithmetic number, because the mean of its divisors is an integer number (147264).

2⁸⁵⁵⁸⁷⁹ is an apocalyptic number.

855879 is a deficient number, since it is larger than the sum of its proper divisors (322233).

855879 is a wasteful number, since it uses less digits than its factorization.

855879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9237.

The product of its digits is 100800, while the sum is 42.

The square root of 855879 is about 925.1372871093. The cubic root of 855879 is about 94.9447139077.

The spelling of 855879 in words is "eight hundred fifty-five thousand, eight hundred seventy-nine".