857117 has 4 divisors (see below), whose sum is σ = 860640. Its totient is φ = 853596.

The previous prime is 857107. The next prime is 857137. The reversal of 857117 is 711758.

857117 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 857117 - 2⁶ = 857053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 857117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1367 + ... + 1892.

It is an arithmetic number, because the mean of its divisors is an integer number (215160).

2⁸⁵⁷¹¹⁷ is an apocalyptic number.

It is an amenable number.

857117 is a deficient number, since it is larger than the sum of its proper divisors (3523).

857117 is a wasteful number, since it uses less digits than its factorization.

857117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522.

The product of its digits is 1960, while the sum is 29.

The square root of 857117 is about 925.8061352141. The cubic root of 857117 is about 94.9904699581.

The spelling of 857117 in words is "eight hundred fifty-seven thousand, one hundred seventeen".