442242 has 24 divisors (see below), whose sum is σ = 973440. Its totient is φ = 145080.

The previous prime is 442237. The next prime is 442243. The reversal of 442242 is 242244.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (442243) by changing a digit.

442242 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 11 ways as a sum of consecutive naturals, for example, 1267 + ... + 1577.

It is an arithmetic number, because the mean of its divisors is an integer number (40560).

2⁴⁴²²⁴² is an apocalyptic number.

442242 is an abundant number, since it is smaller than the sum of its proper divisors (531198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442242 is a wasteful number, since it uses less digits than its factorization.

442242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 395 counting only the distinct ones).

The product of its digits is 512, while the sum is 18.

The square root of 442242 is about 665.0127818320. The cubic root of 442242 is about 76.1880155579.

Adding to 442242 its reverse (242244), we get a palindrome (684486).

The spelling of 442242 in words is "four hundred forty-two thousand, two hundred forty-two", and thus it is an iban number.