857159 has 4 divisors (see below), whose sum is σ = 866880. Its totient is φ = 847440.

The previous prime is 857137. The next prime is 857161. The reversal of 857159 is 951758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 951758 = 2 ⋅475879.

It is a cyclic number.

It is not a de Polignac number, because 857159 - 2⁸ = 856903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857459) 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, 4727 + ... + 4904.

It is an arithmetic number, because the mean of its divisors is an integer number (216720).

2⁸⁵⁷¹⁵⁹ is an apocalyptic number.

857159 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

857159 is a deficient number, since it is larger than the sum of its proper divisors (9721).

857159 is an equidigital number, since it uses as much as digits as its factorization.

857159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720.

The product of its digits is 12600, while the sum is 35.

The square root of 857159 is about 925.8288178708. The cubic root of 857159 is about 94.9920214906.

The spelling of 857159 in words is "eight hundred fifty-seven thousand, one hundred fifty-nine".