855081 has 6 divisors (see below), whose sum is σ = 1235130. Its totient is φ = 570048.

The previous prime is 855079. The next prime is 855089. The reversal of 855081 is 180558.

It can be written as a sum of positive squares in only one way, i.e., 665856 + 189225 = 816^2 + 435^2 .

It is not a de Polignac number, because 855081 - 2¹ = 855079 is a prime.

It is a super-2 number, since 2×855081² = 1462327033122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (855089) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47496 + ... + 47513.

It is an arithmetic number, because the mean of its divisors is an integer number (205855).

2⁸⁵⁵⁰⁸¹ is an apocalyptic number.

It is an amenable number.

855081 is a deficient number, since it is larger than the sum of its proper divisors (380049).

855081 is a wasteful number, since it uses less digits than its factorization.

855081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95015 (or 95012 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 855081 is about 924.7058991917. The cubic root of 855081 is about 94.9151967130.

The spelling of 855081 in words is "eight hundred fifty-five thousand, eighty-one".