859375 has 16 divisors (see below), whose sum is σ = 1171872. Its totient is φ = 625000.

The previous prime is 859373. The next prime is 859381. The reversal of 859375 is 573958.

It is not a de Polignac number, because 859375 - 2¹ = 859373 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859373) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 78120 + ... + 78130.

It is an arithmetic number, because the mean of its divisors is an integer number (73242).

859375 is a Friedman number, since it can be written as 5^8*(7-9/5-3), using all its digits and the basic arithmetic operations.

2⁸⁵⁹³⁷⁵ is an apocalyptic number.

859375 is a deficient number, since it is larger than the sum of its proper divisors (312497).

859375 is an frugal number, since it uses more digits than its factorization.

859375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46 (or 16 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 859375 is about 927.0248108870. The cubic root of 859375 is about 95.0738115190.

It can be divided in two parts, 8593 and 75, that added together give a palindrome (8668).

The spelling of 859375 in words is "eight hundred fifty-nine thousand, three hundred seventy-five".