857085 has 8 divisors (see below), whose sum is σ = 1371360. Its totient is φ = 457104.

The previous prime is 857083. The next prime is 857099. The reversal of 857085 is 580758.

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

It is not a de Polignac number, because 857085 - 2¹ = 857083 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28555 + ... + 28584.

It is an arithmetic number, because the mean of its divisors is an integer number (171420).

2⁸⁵⁷⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

857085 is a deficient number, since it is larger than the sum of its proper divisors (514275).

857085 is a wasteful number, since it uses less digits than its factorization.

857085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57147.

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 857085 is about 925.7888528169. The cubic root of 857085 is about 94.9892878041.

The spelling of 857085 in words is "eight hundred fifty-seven thousand, eighty-five".