842242 has 4 divisors (see below), whose sum is σ = 1263366. Its totient is φ = 421120.

The previous prime is 842209. The next prime is 842249. The reversal of 842242 is 242248.

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

It can be written as a sum of positive squares in only one way, i.e., 829921 + 12321 = 911^2 + 111^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210559 + ... + 210562.

2⁸⁴²²⁴² is an apocalyptic number.

842242 is a deficient number, since it is larger than the sum of its proper divisors (421124).

842242 is a wasteful number, since it uses less digits than its factorization.

842242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421123.

The product of its digits is 1024, while the sum is 22.

The square root of 842242 is about 917.7374352177. The cubic root of 842242 is about 94.4377500317.

It can be divided in two parts, 8422 and 42, that added together give a square (8464 = 92²).

The spelling of 842242 in words is "eight hundred forty-two thousand, two hundred forty-two".