142520039 has 2 divisors, whose sum is σ = 142520040. Its totient is φ = 142520038.

The previous prime is 142520023. The next prime is 142520087. The reversal of 142520039 is 930025241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142520039 - 2⁴ = 142520023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142520089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71260019 + 71260020.

It is an arithmetic number, because the mean of its divisors is an integer number (71260020).

Almost surely, 2^142520039 is an apocalyptic number.

142520039 is a deficient number, since it is larger than the sum of its proper divisors (1).

142520039 is an equidigital number, since it uses as much as digits as its factorization.

142520039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 142520039 is about 11938.1756981542. The cubic root of 142520039 is about 522.3464460292.

The spelling of 142520039 in words is "one hundred forty-two million, five hundred twenty thousand, thirty-nine".