142631791 has 2 divisors, whose sum is σ = 142631792. Its totient is φ = 142631790.

The previous prime is 142631779. The next prime is 142631821. The reversal of 142631791 is 197136241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142631791 - 2⁵ = 142631759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142631711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71315895 + 71315896.

It is an arithmetic number, because the mean of its divisors is an integer number (71315896).

Almost surely, 2^142631791 is an apocalyptic number.

142631791 is a deficient number, since it is larger than the sum of its proper divisors (1).

142631791 is an equidigital number, since it uses as much as digits as its factorization.

142631791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 142631791 is about 11942.8552281270. The cubic root of 142631791 is about 522.4829367992.

The spelling of 142631791 in words is "one hundred forty-two million, six hundred thirty-one thousand, seven hundred ninety-one".