853885 has 4 divisors (see below), whose sum is σ = 1024668. Its totient is φ = 683104.

The previous prime is 853873. The next prime is 853889. The reversal of 853885 is 588358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588358 = 2 ⋅294179.

It can be written as a sum of positive squares in 2 ways, for example, as 210681 + 643204 = 459^2 + 802^2 .

It is a cyclic number.

It is not a de Polignac number, because 853885 - 2¹⁹ = 329597 is a prime.

It is a Duffinian number.

853885 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85384 + ... + 85393.

It is an arithmetic number, because the mean of its divisors is an integer number (256167).

2⁸⁵³⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

853885 is a deficient number, since it is larger than the sum of its proper divisors (170783).

853885 is a wasteful number, since it uses less digits than its factorization.

853885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170782.

The product of its digits is 38400, while the sum is 37.

The square root of 853885 is about 924.0589808016. The cubic root of 853885 is about 94.8709235028.

The spelling of 853885 in words is "eight hundred fifty-three thousand, eight hundred eighty-five".