857143 has 4 divisors (see below), whose sum is σ = 979600. Its totient is φ = 734688.

The previous prime is 857137. The next prime is 857161. The reversal of 857143 is 341758.

857143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 857143 - 2¹⁷ = 726071 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 (857743) by changing a digit.

It is a Kaprekar number, because its square (734694122449) can be partitioned into two parts whose sum is 857143.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61218 + ... + 61231.

It is an arithmetic number, because the mean of its divisors is an integer number (244900).

2⁸⁵⁷¹⁴³ is an apocalyptic number.

857143 is a deficient number, since it is larger than the sum of its proper divisors (122457).

857143 is a wasteful number, since it uses less digits than its factorization.

857143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122456.

The product of its digits is 3360, while the sum is 28.

The square root of 857143 is about 925.8201769242. The cubic root of 857143 is about 94.9914304366.

It can be divided in two parts, 857 and 143, that added together give a cube (1000 = 10³).

The spelling of 857143 in words is "eight hundred fifty-seven thousand, one hundred forty-three".