420404 has 12 divisors (see below), whose sum is σ = 740544. Its totient is φ = 208824.

The previous prime is 420397. The next prime is 420419. The reversal of 420404 is 404024.

It is a congruent number.

It is an unprimeable number.

420404 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677 + ... + 1139.

It is an arithmetic number, because the mean of its divisors is an integer number (61712).

2⁴²⁰⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

420404 is a deficient number, since it is larger than the sum of its proper divisors (320140).

420404 is a wasteful number, since it uses less digits than its factorization.

420404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 420404 is about 648.3856876890. The cubic root of 420404 is about 74.9127281173.

Adding to 420404 its reverse (404024), we get a palindrome (824428).

The spelling of 420404 in words is "four hundred twenty thousand, four hundred four", and thus it is an iban number.