442605 has 16 divisors (see below), whose sum is σ = 745920. Its totient is φ = 223488.

The previous prime is 442601. The next prime is 442609. The reversal of 442605 is 506244.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (442601) and next prime (442609).

It is not a de Polignac number, because 442605 - 2² = 442601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442601) 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, 492 + ... + 1061.

It is an arithmetic number, because the mean of its divisors is an integer number (46620).

2⁴⁴²⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

442605 is a deficient number, since it is larger than the sum of its proper divisors (303315).

442605 is a wasteful number, since it uses less digits than its factorization.

442605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 442605 is about 665.2856529341. The cubic root of 442605 is about 76.2088553441.

Adding to 442605 its reverse (506244), we get a palindrome (948849).

The spelling of 442605 in words is "four hundred forty-two thousand, six hundred five".