142942117 has 2 divisors, whose sum is σ = 142942118. Its totient is φ = 142942116.

The previous prime is 142942109. The next prime is 142942123. The reversal of 142942117 is 711249241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90611361 + 52330756 = 9519^2 + 7234^2 .

It is a cyclic number.

It is not a de Polignac number, because 142942117 - 2³ = 142942109 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 (142942157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71471058 + 71471059.

It is an arithmetic number, because the mean of its divisors is an integer number (71471059).

Almost surely, 2^142942117 is an apocalyptic number.

It is an amenable number.

142942117 is a deficient number, since it is larger than the sum of its proper divisors (1).

142942117 is an equidigital number, since it uses as much as digits as its factorization.

142942117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 142942117 is about 11955.8402883277. The cubic root of 142942117 is about 522.8615868195.

The spelling of 142942117 in words is "one hundred forty-two million, nine hundred forty-two thousand, one hundred seventeen".