142787431 has 2 divisors, whose sum is σ = 142787432. Its totient is φ = 142787430.

The previous prime is 142787423. The next prime is 142787467. The reversal of 142787431 is 134787241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142787431 - 2³ = 142787423 is a prime.

It is a super-2 number, since 2×142787431² = 40776500903159522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142787231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71393715 + 71393716.

It is an arithmetic number, because the mean of its divisors is an integer number (71393716).

Almost surely, 2^142787431 is an apocalyptic number.

142787431 is a deficient number, since it is larger than the sum of its proper divisors (1).

142787431 is an equidigital number, since it uses as much as digits as its factorization.

142787431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 37.

The square root of 142787431 is about 11949.3694812739. The cubic root of 142787431 is about 522.6729124072.

The spelling of 142787431 in words is "one hundred forty-two million, seven hundred eighty-seven thousand, four hundred thirty-one".