405020403 has 12 divisors (see below), whose sum is σ = 590823168. Its totient is φ = 267339600.

The previous prime is 405020401. The next prime is 405020431. The reversal of 405020403 is 304020504.

It is a happy number.

It is not a de Polignac number, because 405020403 - 2¹ = 405020401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405020401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221875 + ... + 223692.

It is an arithmetic number, because the mean of its divisors is an integer number (49235264).

Almost surely, 2^405020403 is an apocalyptic number.

405020403 is a deficient number, since it is larger than the sum of its proper divisors (185802765).

405020403 is a wasteful number, since it uses less digits than its factorization.

405020403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445674 (or 445671 counting only the distinct ones).

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

The square root of 405020403 is about 20125.1187077244. The cubic root of 405020403 is about 739.8760463189.

Adding to 405020403 its reverse (304020504), we get a palindrome (709040907).

The spelling of 405020403 in words is "four hundred five million, twenty thousand, four hundred three".