142631171 has 2 divisors, whose sum is σ = 142631172. Its totient is φ = 142631170.

The previous prime is 142631149. The next prime is 142631191. The reversal of 142631171 is 171136241.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142631171 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142631171.

It is not a weakly prime, because it can be changed into another prime (142631191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71315585 + 71315586.

It is an arithmetic number, because the mean of its divisors is an integer number (71315586).

Almost surely, 2^142631171 is an apocalyptic number.

142631171 is a deficient number, since it is larger than the sum of its proper divisors (1).

142631171 is an equidigital number, since it uses as much as digits as its factorization.

142631171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 142631171 is about 11942.8292711568. The cubic root of 142631171 is about 522.4821797452.

The spelling of 142631171 in words is "one hundred forty-two million, six hundred thirty-one thousand, one hundred seventy-one".