442219 has 4 divisors (see below), whose sum is σ = 445096. Its totient is φ = 439344.

The previous prime is 442217. The next prime is 442229. The reversal of 442219 is 912244.

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

It is a cyclic number.

It is not a de Polignac number, because 442219 - 2¹ = 442217 is a prime.

It is a super-2 number, since 2×442219² = 391115287922, which contains 22 as substring.

It is a Duffinian number.

442219 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 442219.

It is not an unprimeable number, because it can be changed into a prime (442217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194 + ... + 1519.

It is an arithmetic number, because the mean of its divisors is an integer number (111274).

2⁴⁴²²¹⁹ is an apocalyptic number.

442219 is a deficient number, since it is larger than the sum of its proper divisors (2877).

442219 is a wasteful number, since it uses less digits than its factorization.

442219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2876.

The product of its digits is 576, while the sum is 22.

The square root of 442219 is about 664.9954887065. The cubic root of 442219 is about 76.1866947466.

The spelling of 442219 in words is "four hundred forty-two thousand, two hundred nineteen".