442005 has 16 divisors (see below), whose sum is σ = 718080. Its totient is φ = 232128.

The previous prime is 442003. The next prime is 442007. The reversal of 442005 is 500244.

It is an interprime number because it is at equal distance from previous prime (442003) and next prime (442007).

It is not a de Polignac number, because 442005 - 2¹ = 442003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 999 + ... + 1371.

It is an arithmetic number, because the mean of its divisors is an integer number (44880).

2⁴⁴²⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

442005 is a deficient number, since it is larger than the sum of its proper divisors (276075).

442005 is a wasteful number, since it uses less digits than its factorization.

442005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 442005 is about 664.8345658884. The cubic root of 442005 is about 76.1744032626.

Adding to 442005 its reverse (500244), we get a palindrome (942249).

The spelling of 442005 in words is "four hundred forty-two thousand, five".