857142431 has 16 divisors (see below), whose sum is σ = 934281216. Its totient is φ = 783248256.

The previous prime is 857142409. The next prime is 857142523. The reversal of 857142431 is 134241758.

It is a cyclic number.

It is not a de Polignac number, because 857142431 - 2⁶ = 857142367 is a prime.

It is a super-2 number, since 2×857142431² = 1469386294041179522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 857142391 and 857142400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857142401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97250 + ... + 105696.

It is an arithmetic number, because the mean of its divisors is an integer number (58392576).

Almost surely, 2^857142431 is an apocalyptic number.

857142431 is a deficient number, since it is larger than the sum of its proper divisors (77138785).

857142431 is a wasteful number, since it uses less digits than its factorization.

857142431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8638.

The product of its digits is 26880, while the sum is 35.

The square root of 857142431 is about 29276.9949106803. The cubic root of 857142431 is about 949.9140941711.

The spelling of 857142431 in words is "eight hundred fifty-seven million, one hundred forty-two thousand, four hundred thirty-one".