853985 has 8 divisors (see below), whose sum is σ = 1118016. Its totient is φ = 621040.

The previous prime is 853981. The next prime is 853999. The reversal of 853985 is 589358.

853985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 853985 - 2² = 853981 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 853985.

It is not an unprimeable number, because it can be changed into a prime (853981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7709 + ... + 7818.

It is an arithmetic number, because the mean of its divisors is an integer number (139752).

2⁸⁵³⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

853985 is a deficient number, since it is larger than the sum of its proper divisors (264031).

853985 is a wasteful number, since it uses less digits than its factorization.

853985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15543.

The product of its digits is 43200, while the sum is 38.

The square root of 853985 is about 924.1130883177. The cubic root of 853985 is about 94.8746268595.

The spelling of 853985 in words is "eight hundred fifty-three thousand, nine hundred eighty-five".