855172 has 12 divisors (see below), whose sum is σ = 1503040. Its totient is φ = 425736.

The previous prime is 855143. The next prime is 855187. The reversal of 855172 is 271558.

It is a self number, because there is not a number n which added to its sum of digits gives 855172.

It is an unprimeable number.

855172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513 + ... + 1999.

2⁸⁵⁵¹⁷² is an apocalyptic number.

It is an amenable number.

855172 is a deficient number, since it is larger than the sum of its proper divisors (647868).

855172 is a wasteful number, since it uses less digits than its factorization.

855172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930 (or 928 counting only the distinct ones).

The product of its digits is 2800, while the sum is 28.

The square root of 855172 is about 924.7551027164. The cubic root of 855172 is about 94.9185636363.

The spelling of 855172 in words is "eight hundred fifty-five thousand, one hundred seventy-two".