442489 has 2 divisors, whose sum is σ = 442490. Its totient is φ = 442488.

The previous prime is 442487. The next prime is 442499. The reversal of 442489 is 984244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435600 + 6889 = 660^2 + 83^2 .

It is a cyclic number.

It is not a de Polignac number, because 442489 - 2¹ = 442487 is a prime.

Together with 442487, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 442489.

It is not a weakly prime, because it can be changed into another prime (442487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221244 + 221245.

It is an arithmetic number, because the mean of its divisors is an integer number (221245).

2⁴⁴²⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

442489 is a deficient number, since it is larger than the sum of its proper divisors (1).

442489 is an equidigital number, since it uses as much as digits as its factorization.

442489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 31.

The square root of 442489 is about 665.1984666248. The cubic root of 442489 is about 76.2021970373.

The spelling of 442489 in words is "four hundred forty-two thousand, four hundred eighty-nine".