442785 has 16 divisors (see below), whose sum is σ = 809856. Its totient is φ = 202368.

The previous prime is 442781. The next prime is 442789. The reversal of 442785 is 587244.

It is an interprime number because it is at equal distance from previous prime (442781) and next prime (442789).

It is not a de Polignac number, because 442785 - 2² = 442781 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 442785.

It is not an unprimeable number, because it can be changed into a prime (442781) 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, 2004 + ... + 2213.

It is an arithmetic number, because the mean of its divisors is an integer number (50616).

2⁴⁴²⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

442785 is a deficient number, since it is larger than the sum of its proper divisors (367071).

442785 is a wasteful number, since it uses less digits than its factorization.

442785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4232.

The product of its digits is 8960, while the sum is 30.

The square root of 442785 is about 665.4209194187. The cubic root of 442785 is about 76.2191848967.

The spelling of 442785 in words is "four hundred forty-two thousand, seven hundred eighty-five".