442825 has 6 divisors (see below), whose sum is σ = 549134. Its totient is φ = 354240.

The previous prime is 442823. The next prime is 442829. The reversal of 442825 is 528244.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 107584 + 335241 = 328^2 + 579^2 .

It is not a de Polignac number, because 442825 - 2¹ = 442823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 17713 = 442825 / (4 + 4 + 2 + 8 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442825.

It is not an unprimeable number, because it can be changed into a prime (442823) 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, 8832 + ... + 8881.

2⁴⁴²⁸²⁵ is an apocalyptic number.

It is an amenable number.

442825 is a deficient number, since it is larger than the sum of its proper divisors (106309).

442825 is a wasteful number, since it uses less digits than its factorization.

442825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17723 (or 17718 counting only the distinct ones).

The product of its digits is 2560, while the sum is 25.

The square root of 442825 is about 665.4509749035. The cubic root of 442825 is about 76.2214799726.

The spelling of 442825 in words is "four hundred forty-two thousand, eight hundred twenty-five".