442539 has 6 divisors (see below), whose sum is σ = 639236. Its totient is φ = 295020.

The previous prime is 442537. The next prime is 442571. The reversal of 442539 is 935244.

It is not a de Polignac number, because 442539 - 2¹ = 442537 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 442539.

It is not an unprimeable number, because it can be changed into a prime (442531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24577 + ... + 24594.

2⁴⁴²⁵³⁹ is an apocalyptic number.

442539 is a deficient number, since it is larger than the sum of its proper divisors (196697).

442539 is a wasteful number, since it uses less digits than its factorization.

442539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49177 (or 49174 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 442539 is about 665.2360483317. The cubic root of 442539 is about 76.2050671398.

The spelling of 442539 in words is "four hundred forty-two thousand, five hundred thirty-nine".