859885 has 8 divisors (see below), whose sum is σ = 1111320. Its totient is φ = 634944.

The previous prime is 859861. The next prime is 859891. The reversal of 859885 is 588958.

It can be written as a sum of positive squares in 4 ways, for example, as 198916 + 660969 = 446^2 + 813^2 .

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 859885 - 2⁵ = 859853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6550 + ... + 6679.

It is an arithmetic number, because the mean of its divisors is an integer number (138915).

2⁸⁵⁹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

859885 is a deficient number, since it is larger than the sum of its proper divisors (251435).

859885 is a wasteful number, since it uses less digits than its factorization.

859885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13247.

The product of its digits is 115200, while the sum is 43.

The square root of 859885 is about 927.2998436320. The cubic root of 859885 is about 95.0926151284.

The spelling of 859885 in words is "eight hundred fifty-nine thousand, eight hundred eighty-five".