442087 has 6 divisors (see below), whose sum is σ = 453248. Its totient is φ = 431172.

The previous prime is 442069. The next prime is 442097. The reversal of 442087 is 780244.

It is not a de Polignac number, because 442087 - 2¹¹ = 440039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3418 + ... + 3544.

2⁴⁴²⁰⁸⁷ is an apocalyptic number.

442087 is a deficient number, since it is larger than the sum of its proper divisors (11161).

442087 is an equidigital number, since it uses as much as digits as its factorization.

442087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 442087 is about 664.8962325055. The cubic root of 442087 is about 76.1791135523.

The spelling of 442087 in words is "four hundred forty-two thousand, eighty-seven".