442533 has 16 divisors (see below), whose sum is σ = 726656. Its totient is φ = 233280.

The previous prime is 442531. The next prime is 442537. The reversal of 442533 is 335244.

It is a happy number.

It is not a de Polignac number, because 442533 - 2¹ = 442531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a d-powerful number, because it can be written as 4 + 4⁹ + 5⁵ + 2⁵ + 3⁴ + 3¹¹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442531) 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, 538 + ... + 1083.

It is an arithmetic number, because the mean of its divisors is an integer number (45416).

2⁴⁴²⁵³³ is an apocalyptic number.

It is an amenable number.

442533 is a deficient number, since it is larger than the sum of its proper divisors (284123).

442533 is a wasteful number, since it uses less digits than its factorization.

442533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644.

The product of its digits is 1440, while the sum is 21.

The square root of 442533 is about 665.2315386390. The cubic root of 442533 is about 76.2047227390.

Adding to 442533 its reverse (335244), we get a palindrome (777777).

The spelling of 442533 in words is "four hundred forty-two thousand, five hundred thirty-three".