158439 has 4 divisors (see below), whose sum is σ = 211256. Its totient is φ = 105624.

The previous prime is 158429. The next prime is 158443. The reversal of 158439 is 934851.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 158439 - 2⁵ = 158407 is a prime.

It is a D-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 158439.

It is not an unprimeable number, because it can be changed into a prime (158419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26404 + ... + 26409.

It is an arithmetic number, because the mean of its divisors is an integer number (52814).

2¹⁵⁸⁴³⁹ is an apocalyptic number.

158439 is a deficient number, since it is larger than the sum of its proper divisors (52817).

158439 is an equidigital number, since it uses as much as digits as its factorization.

158439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52816.

The product of its digits is 4320, while the sum is 30.

The square root of 158439 is about 398.0439674207. The cubic root of 158439 is about 54.1112247976. Note that the first 3 decimals are identical.

It can be divided in two parts, 1584 and 39, that multiplied together give a triangular number (61776 = T₃₅₁).

The spelling of 158439 in words is "one hundred fifty-eight thousand, four hundred thirty-nine".