857142873 has 12 divisors (see below), whose sum is σ = 1310924628. Its totient is φ = 537815040.

The previous prime is 857142841. The next prime is 857142887. The reversal of 857142873 is 378241758.

857142873 is a `hidden beast` number, since 8 + 571 + 4 + 2 + 8 + 73 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 667033929 + 190108944 = 25827^2 + 13788^2 .

It is not a de Polignac number, because 857142873 - 2⁵ = 857142841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857142833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2800968 + ... + 2801273.

It is an arithmetic number, because the mean of its divisors is an integer number (109243719).

Almost surely, 2^857142873 is an apocalyptic number.

It is an amenable number.

857142873 is a deficient number, since it is larger than the sum of its proper divisors (453781755).

857142873 is a wasteful number, since it uses less digits than its factorization.

857142873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5602264 (or 5602261 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 857142873 is about 29277.0024592683. The cubic root of 857142873 is about 949.9142574508.

The spelling of 857142873 in words is "eight hundred fifty-seven million, one hundred forty-two thousand, eight hundred seventy-three".