853555 has 4 divisors (see below), whose sum is σ = 1024272. Its totient is φ = 682840.

The previous prime is 853547. The next prime is 853571. The reversal of 853555 is 555358.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 853555 - 2³ = 853547 is a prime.

It is a super-2 number, since 2×853555² = 1457112276050, which contains 22 as substring.

It is a Duffinian number.

853555 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85351 + ... + 85360.

It is an arithmetic number, because the mean of its divisors is an integer number (256068).

2⁸⁵³⁵⁵⁵ is an apocalyptic number.

853555 is a deficient number, since it is larger than the sum of its proper divisors (170717).

853555 is a wasteful number, since it uses less digits than its factorization.

853555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170716.

The product of its digits is 15000, while the sum is 31.

The square root of 853555 is about 923.8804035155. The cubic root of 853555 is about 94.8587003741.

The spelling of 853555 in words is "eight hundred fifty-three thousand, five hundred fifty-five".