855181 has 8 divisors (see below), whose sum is σ = 909720. Its totient is φ = 802368.

The previous prime is 855143. The next prime is 855187. The reversal of 855181 is 181558.

It can be written as a sum of positive squares in 4 ways, for example, as 292681 + 562500 = 541^2 + 750^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 855181 - 2¹¹ = 853133 is a prime.

It is a super-2 number, since 2×855181² = 1462669085522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855187) 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, 675 + ... + 1471.

It is an arithmetic number, because the mean of its divisors is an integer number (113715).

2⁸⁵⁵¹⁸¹ is an apocalyptic number.

It is an amenable number.

855181 is a deficient number, since it is larger than the sum of its proper divisors (54539).

855181 is a wasteful number, since it uses less digits than its factorization.

855181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863.

The product of its digits is 1600, while the sum is 28.

The square root of 855181 is about 924.7599688568. The cubic root of 855181 is about 94.9188966158.

The spelling of 855181 in words is "eight hundred fifty-five thousand, one hundred eighty-one".