442503 has 14 divisors (see below), whose sum is σ = 664544. Its totient is φ = 294516.

The previous prime is 442501. The next prime is 442517. The reversal of 442503 is 305244.

It is a happy number.

It is not a de Polignac number, because 442503 - 2¹ = 442501 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 3 and base 9.

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 442503.

It is not an unprimeable number, because it can be changed into a prime (442501) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 426 + ... + 1032.

2⁴⁴²⁵⁰³ is an apocalyptic number.

442503 is a deficient number, since it is larger than the sum of its proper divisors (222041).

442503 is an frugal number, since it uses more digits than its factorization.

442503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 442503 is about 665.2089897168. The cubic root of 442503 is about 76.2030006878.

Adding to 442503 its reverse (305244), we get a palindrome (747747).

It can be divided in two parts, 44250 and 3, that added together give a triangular number (44253 = T₂₉₇).

The spelling of 442503 in words is "four hundred forty-two thousand, five hundred three".