142549117 has 2 divisors, whose sum is σ = 142549118. Its totient is φ = 142549116.

The previous prime is 142549109. The next prime is 142549139. The reversal of 142549117 is 711945241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115154361 + 27394756 = 10731^2 + 5234^2 .

It is a cyclic number.

It is not a de Polignac number, because 142549117 - 2³ = 142549109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142549157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71274558 + 71274559.

It is an arithmetic number, because the mean of its divisors is an integer number (71274559).

Almost surely, 2^142549117 is an apocalyptic number.

It is an amenable number.

142549117 is a deficient number, since it is larger than the sum of its proper divisors (1).

142549117 is an equidigital number, since it uses as much as digits as its factorization.

142549117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 142549117 is about 11939.3934938086. The cubic root of 142549117 is about 522.3819679512.

The spelling of 142549117 in words is "one hundred forty-two million, five hundred forty-nine thousand, one hundred seventeen".