142155317 has 2 divisors, whose sum is σ = 142155318. Its totient is φ = 142155316.

The previous prime is 142155289. The next prime is 142155319. The reversal of 142155317 is 713551241.

142155317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103042801 + 39112516 = 10151^2 + 6254^2 .

It is a cyclic number.

It is not a de Polignac number, because 142155317 - 2¹⁰ = 142154293 is a prime.

Together with 142155319, it forms a pair of twin primes.

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 142155317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142155319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71077658 + 71077659.

It is an arithmetic number, because the mean of its divisors is an integer number (71077659).

Almost surely, 2^142155317 is an apocalyptic number.

It is an amenable number.

142155317 is a deficient number, since it is larger than the sum of its proper divisors (1).

142155317 is an equidigital number, since it uses as much as digits as its factorization.

142155317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 29.

The square root of 142155317 is about 11922.8904633063. The cubic root of 142155317 is about 521.9004877269.

The spelling of 142155317 in words is "one hundred forty-two million, one hundred fifty-five thousand, three hundred seventeen".