853881 has 16 divisors (see below), whose sum is σ = 1321344. Its totient is φ = 480384.

The previous prime is 853873. The next prime is 853889. The reversal of 853881 is 188358.

It is an interprime number because it is at equal distance from previous prime (853873) and next prime (853889).

It is not a de Polignac number, because 853881 - 2³ = 853873 is a prime.

It is a super-2 number, since 2×853881² = 1458225524322, which contains 22 as substring.

Its product of digits (7680) is a multiple of the sum of its prime divisors (640).

853881 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1255 + ... + 1811.

It is an arithmetic number, because the mean of its divisors is an integer number (82584).

2⁸⁵³⁸⁸¹ is an apocalyptic number.

It is an amenable number.

853881 is a deficient number, since it is larger than the sum of its proper divisors (467463).

853881 is a wasteful number, since it uses less digits than its factorization.

853881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640.

The product of its digits is 7680, while the sum is 33.

The square root of 853881 is about 924.0568164350. The cubic root of 853881 is about 94.8707753625.

The spelling of 853881 in words is "eight hundred fifty-three thousand, eight hundred eighty-one".