857018 has 4 divisors (see below), whose sum is σ = 1285530. Its totient is φ = 428508.

The previous prime is 857011. The next prime is 857027. The reversal of 857018 is 810758.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 840889 + 16129 = 917^2 + 127^2 .

It is not an unprimeable number, because it can be changed into a prime (857011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214253 + ... + 214256.

2⁸⁵⁷⁰¹⁸ is an apocalyptic number.

857018 is a deficient number, since it is larger than the sum of its proper divisors (428512).

857018 is a wasteful number, since it uses less digits than its factorization.

857018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428511.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 857018 is about 925.7526667528. The cubic root of 857018 is about 94.9868125739.

Subtracting from 857018 its product of nonzero digits (2240), we obtain a triangular number (854778 = T₁₃₀₇).

The spelling of 857018 in words is "eight hundred fifty-seven thousand, eighteen".