442842 has 16 divisors (see below), whose sum is σ = 924480. Its totient is φ = 141152.

The previous prime is 442837. The next prime is 442843. The reversal of 442842 is 248244.

It is a super-2 number, since 2×442842² = 392218073928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (442843) 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, 1467 + ... + 1742.

It is an arithmetic number, because the mean of its divisors is an integer number (57780).

2⁴⁴²⁸⁴² is an apocalyptic number.

442842 is an abundant number, since it is smaller than the sum of its proper divisors (481638).

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

442842 is a wasteful number, since it uses less digits than its factorization.

442842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237.

The product of its digits is 2048, while the sum is 24.

The square root of 442842 is about 665.4637480735. The cubic root of 442842 is about 76.2224553380. Note that the first 3 decimals are identical.

The spelling of 442842 in words is "four hundred forty-two thousand, eight hundred forty-two".