142171530655709 has 2 divisors, whose sum is σ = 142171530655710. Its totient is φ = 142171530655708.

The previous prime is 142171530655699. The next prime is 142171530655711. The reversal of 142171530655709 is 907556035171241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140930066731609 + 1241463924100 = 11871397^2 + 1114210^2 .

It is a cyclic number.

It is not a de Polignac number, because 142171530655709 - 2¹² = 142171530651613 is a prime.

Together with 142171530655711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142171530655769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71085765327854 + 71085765327855.

It is an arithmetic number, because the mean of its divisors is an integer number (71085765327855).

Almost surely, 2^{142171530655709} is an apocalyptic number.

It is an amenable number.

142171530655709 is a deficient number, since it is larger than the sum of its proper divisors (1).

142171530655709 is an equidigital number, since it uses as much as digits as its factorization.

142171530655709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938000, while the sum is 56.

The spelling of 142171530655709 in words is "one hundred forty-two trillion, one hundred seventy-one billion, five hundred thirty million, six hundred fifty-five thousand, seven hundred nine".