142318081 has 2 divisors, whose sum is σ = 142318082. Its totient is φ = 142318080.

The previous prime is 142318049. The next prime is 142318103. The reversal of 142318081 is 180813241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91680625 + 50637456 = 9575^2 + 7116^2 .

It is a cyclic number.

It is not a de Polignac number, because 142318081 - 2⁵ = 142318049 is a prime.

It is a super-2 number, since 2×142318081² = 40508872359045122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142318381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71159040 + 71159041.

It is an arithmetic number, because the mean of its divisors is an integer number (71159041).

Almost surely, 2^142318081 is an apocalyptic number.

It is an amenable number.

142318081 is a deficient number, since it is larger than the sum of its proper divisors (1).

142318081 is an equidigital number, since it uses as much as digits as its factorization.

142318081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 142318081 is about 11929.7142044560. The cubic root of 142318081 is about 522.0995990766.

The spelling of 142318081 in words is "one hundred forty-two million, three hundred eighteen thousand, eighty-one".