142856431 has 2 divisors, whose sum is σ = 142856432. Its totient is φ = 142856430.

The previous prime is 142856387. The next prime is 142856437. The reversal of 142856431 is 134658241.

142856431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142856431 - 2²⁵ = 109301999 is a prime.

It is a super-2 number, since 2×142856431² = 40815919756115522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142856437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71428215 + 71428216.

It is an arithmetic number, because the mean of its divisors is an integer number (71428216).

Almost surely, 2^142856431 is an apocalyptic number.

142856431 is a deficient number, since it is larger than the sum of its proper divisors (1).

142856431 is an equidigital number, since it uses as much as digits as its factorization.

142856431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 34.

The square root of 142856431 is about 11952.2563141860. The cubic root of 142856431 is about 522.7570902723.

The spelling of 142856431 in words is "one hundred forty-two million, eight hundred fifty-six thousand, four hundred thirty-one".