142439 has 8 divisors (see below), whose sum is σ = 162432. Its totient is φ = 123640.

The previous prime is 142433. The next prime is 142453. The reversal of 142439 is 934241.

142439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142439 - 2⁸ = 142183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142439.

It is not an unprimeable number, because it can be changed into a prime (142433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29 + ... + 534.

It is an arithmetic number, because the mean of its divisors is an integer number (20304).

2¹⁴²⁴³⁹ is an apocalyptic number.

142439 is a deficient number, since it is larger than the sum of its proper divisors (19993).

142439 is a wasteful number, since it uses less digits than its factorization.

142439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597.

The product of its digits is 864, while the sum is 23.

The square root of 142439 is about 377.4109166413. The cubic root of 142439 is about 52.2247422622.

The spelling of 142439 in words is "one hundred forty-two thousand, four hundred thirty-nine".