506403 has 6 divisors (see below), whose sum is σ = 731484. Its totient is φ = 337596.

The previous prime is 506393. The next prime is 506417. The reversal of 506403 is 304605.

It is a happy number.

It is not a de Polignac number, because 506403 - 2⁶ = 506339 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 506403.

It is not an unprimeable number, because it can be changed into a prime (506423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28125 + ... + 28142.

It is an arithmetic number, because the mean of its divisors is an integer number (121914).

2⁵⁰⁶⁴⁰³ is an apocalyptic number.

506403 is a deficient number, since it is larger than the sum of its proper divisors (225081).

506403 is a wasteful number, since it uses less digits than its factorization.

506403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56273 (or 56270 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 506403 is about 711.6199828560. The cubic root of 506403 is about 79.7074208558.

It can be divided in two parts, 506 and 403, that added together give a palindrome (909).

The spelling of 506403 in words is "five hundred six thousand, four hundred three".