420403405 has 8 divisors (see below), whose sum is σ = 531036000. Its totient is φ = 318621456.

The previous prime is 420403393. The next prime is 420403409. The reversal of 420403405 is 504304024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420403405 - 2¹⁵ = 420370637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420403409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2212555 + ... + 2212744.

It is an arithmetic number, because the mean of its divisors is an integer number (66379500).

Almost surely, 2^420403405 is an apocalyptic number.

It is an amenable number.

420403405 is a deficient number, since it is larger than the sum of its proper divisors (110632595).

420403405 is a wasteful number, since it uses less digits than its factorization.

420403405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425323.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 420403405 is about 20503.7412439779. The cubic root of 420403405 is about 749.1269277579.

Adding to 420403405 its reverse (504304024), we get a palindrome (924707429).

The spelling of 420403405 in words is "four hundred twenty million, four hundred three thousand, four hundred five".