442118 has 4 divisors (see below), whose sum is σ = 663180. Its totient is φ = 221058.

The previous prime is 442109. The next prime is 442121. The reversal of 442118 is 811244.

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

It is a self number, because there is not a number n which added to its sum of digits gives 442118.

It is a congruent number.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 110528 + ... + 110531.

It is an arithmetic number, because the mean of its divisors is an integer number (165795).

2⁴⁴²¹¹⁸ is an apocalyptic number.

442118 is a deficient number, since it is larger than the sum of its proper divisors (221062).

442118 is a wasteful number, since it uses less digits than its factorization.

442118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221061.

The product of its digits is 256, while the sum is 20.

The square root of 442118 is about 664.9195440051. The cubic root of 442118 is about 76.1808941199.

The spelling of 442118 in words is "four hundred forty-two thousand, one hundred eighteen".