142717717 has 2 divisors, whose sum is σ = 142717718. Its totient is φ = 142717716.

The previous prime is 142717697. The next prime is 142717781. The reversal of 142717717 is 717717241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118570321 + 24147396 = 10889^2 + 4914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142717717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142717217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71358858 + 71358859.

It is an arithmetic number, because the mean of its divisors is an integer number (71358859).

Almost surely, 2^142717717 is an apocalyptic number.

It is an amenable number.

142717717 is a deficient number, since it is larger than the sum of its proper divisors (1).

142717717 is an equidigital number, since it uses as much as digits as its factorization.

142717717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19208, while the sum is 37.

The square root of 142717717 is about 11946.4520674550. The cubic root of 142717717 is about 522.5878359388.

The spelling of 142717717 in words is "one hundred forty-two million, seven hundred seventeen thousand, seven hundred seventeen".