405403 has 6 divisors (see below), whose sum is σ = 428244. Its totient is φ = 383724.

The previous prime is 405401. The next prime is 405407. The reversal of 405403 is 304504.

It is not a de Polignac number, because 405403 - 2¹ = 405401 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (405401) 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, 201 + ... + 922.

It is an arithmetic number, because the mean of its divisors is an integer number (71374).

2⁴⁰⁵⁴⁰³ is an apocalyptic number.

405403 is a deficient number, since it is larger than the sum of its proper divisors (22841).

405403 is a wasteful number, since it uses less digits than its factorization.

405403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 405403 is about 636.7126510444. The cubic root of 405403 is about 74.0108944272.

Adding to 405403 its reverse (304504), we get a palindrome (709907).

It can be divided in two parts, 405 and 403, that added together give a palindrome (808).

The spelling of 405403 in words is "four hundred five thousand, four hundred three".