142539 has 4 divisors (see below), whose sum is σ = 190056. Its totient is φ = 95024.

The previous prime is 142537. The next prime is 142543. The reversal of 142539 is 935241.

142539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935241 = 3 ⋅311747.

It is a cyclic number.

It is not a de Polignac number, because 142539 - 2¹ = 142537 is a prime.

It is a D-number.

142539 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142539.

It is not an unprimeable number, because it can be changed into a prime (142537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23754 + ... + 23759.

It is an arithmetic number, because the mean of its divisors is an integer number (47514).

2¹⁴²⁵³⁹ is an apocalyptic number.

142539 is a deficient number, since it is larger than the sum of its proper divisors (47517).

142539 is an equidigital number, since it uses as much as digits as its factorization.

142539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47516.

The product of its digits is 1080, while the sum is 24.

The square root of 142539 is about 377.5433749915. The cubic root of 142539 is about 52.2369609489.

The spelling of 142539 in words is "one hundred forty-two thousand, five hundred thirty-nine".