420204 has 36 divisors (see below), whose sum is σ = 1045464. Its totient is φ = 131328.

The previous prime is 420193. The next prime is 420221. The reversal of 420204 is 402024.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 420204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4284 + ... + 4380.

2⁴²⁰²⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522732).

420204 is an abundant number, since it is smaller than the sum of its proper divisors (625260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420204 is a wasteful number, since it uses less digits than its factorization.

420204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 420204 is about 648.2314401508. The cubic root of 420204 is about 74.9008467507.

Adding to 420204 its reverse (402024), we get a palindrome (822228).

It can be divided in two parts, 42020 and 4, that added together give a palindrome (42024).

The spelling of 420204 in words is "four hundred twenty thousand, two hundred four", and thus it is an iban number.