142538739 has 16 divisors (see below), whose sum is σ = 217447680. Its totient is φ = 81358560.

The previous prime is 142538719. The next prime is 142538743. The reversal of 142538739 is 937835241.

It is not a de Polignac number, because 142538739 - 2⁵ = 142538707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142538739.

It is not an unprimeable number, because it can be changed into a prime (142538719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18069 + ... + 24729.

It is an arithmetic number, because the mean of its divisors is an integer number (13590480).

Almost surely, 2^142538739 is an apocalyptic number.

142538739 is a deficient number, since it is larger than the sum of its proper divisors (74908941).

142538739 is a wasteful number, since it uses less digits than its factorization.

142538739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7690.

The product of its digits is 181440, while the sum is 42.

The square root of 142538739 is about 11938.9588742067. The cubic root of 142538739 is about 522.3692906562.

The spelling of 142538739 in words is "one hundred forty-two million, five hundred thirty-eight thousand, seven hundred thirty-nine".