242239 has 4 divisors (see below), whose sum is σ = 248824. Its totient is φ = 235656.

The previous prime is 242227. The next prime is 242243. The reversal of 242239 is 932242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932242 = 2 ⋅466121.

It is a cyclic number.

It is not a de Polignac number, because 242239 - 2⁹ = 241727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242279) 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, 3237 + ... + 3310.

It is an arithmetic number, because the mean of its divisors is an integer number (62206).

2²⁴²²³⁹ is an apocalyptic number.

242239 is a deficient number, since it is larger than the sum of its proper divisors (6585).

242239 is an equidigital number, since it uses as much as digits as its factorization.

242239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6584.

The product of its digits is 864, while the sum is 22.

The square root of 242239 is about 492.1778133967. The cubic root of 242239 is about 62.3373048521.

The spelling of 242239 in words is "two hundred forty-two thousand, two hundred thirty-nine".