842239 has 8 divisors (see below), whose sum is σ = 881280. Its totient is φ = 804000.

The previous prime is 842209. The next prime is 842249. The reversal of 842239 is 932248.

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

It is a cyclic number.

It is not a de Polignac number, because 842239 - 2⁷ = 842111 is a prime.

It is a Duffinian number.

842239 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842209) 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, 2997 + ... + 3265.

It is an arithmetic number, because the mean of its divisors is an integer number (110160).

2⁸⁴²²³⁹ is an apocalyptic number.

842239 is a deficient number, since it is larger than the sum of its proper divisors (39041).

842239 is a wasteful number, since it uses less digits than its factorization.

842239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401.

The product of its digits is 3456, while the sum is 28.

The square root of 842239 is about 917.7358007619. The cubic root of 842239 is about 94.4376379050.

Subtracting 842239 from its reverse (932248), we obtain a palindrome (90009).

It can be divided in two parts, 842 and 239, that added together give a triangular number (1081 = T₄₆).

The spelling of 842239 in words is "eight hundred forty-two thousand, two hundred thirty-nine".