142257539 has 2 divisors, whose sum is σ = 142257540. Its totient is φ = 142257538.

The previous prime is 142257527. The next prime is 142257587. The reversal of 142257539 is 935752241.

142257539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (935752241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142257539 - 2²⁴ = 125480323 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (142257589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71128769 + 71128770.

It is an arithmetic number, because the mean of its divisors is an integer number (71128770).

Almost surely, 2^142257539 is an apocalyptic number.

142257539 is a deficient number, since it is larger than the sum of its proper divisors (1).

142257539 is an equidigital number, since it uses as much as digits as its factorization.

142257539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

The square root of 142257539 is about 11927.1764890103. The cubic root of 142257539 is about 522.0255549895.

The spelling of 142257539 in words is "one hundred forty-two million, two hundred fifty-seven thousand, five hundred thirty-nine".