857123 has 8 divisors (see below), whose sum is σ = 916992. Its totient is φ = 798336.

The previous prime is 857107. The next prime is 857137. The reversal of 857123 is 321758.

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 857123 - 2⁴ = 857107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 857092 and 857101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857723) 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, 1961 + ... + 2357.

It is an arithmetic number, because the mean of its divisors is an integer number (114624).

2⁸⁵⁷¹²³ is an apocalyptic number.

857123 is a deficient number, since it is larger than the sum of its proper divisors (59869).

857123 is a wasteful number, since it uses less digits than its factorization.

857123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541.

The product of its digits is 1680, while the sum is 26.

The square root of 857123 is about 925.8093756276. The cubic root of 857123 is about 94.9906916087.

The spelling of 857123 in words is "eight hundred fifty-seven thousand, one hundred twenty-three".