859985 has 8 divisors (see below), whose sum is σ = 1179456. Its totient is φ = 589680.

The previous prime is 859981. The next prime is 859987. The reversal of 859985 is 589958.

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

It is not a de Polignac number, because 859985 - 2² = 859981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (859981) 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, 12251 + ... + 12320.

It is an arithmetic number, because the mean of its divisors is an integer number (147432).

2⁸⁵⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

859985 is a deficient number, since it is larger than the sum of its proper divisors (319471).

859985 is a wasteful number, since it uses less digits than its factorization.

859985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24583.

The product of its digits is 129600, while the sum is 44.

The square root of 859985 is about 927.3537620563. The cubic root of 859985 is about 95.0963012387.

The spelling of 859985 in words is "eight hundred fifty-nine thousand, nine hundred eighty-five".