420204425 has 24 divisors (see below), whose sum is σ = 531372984. Its totient is φ = 329564160.

The previous prime is 420204401. The next prime is 420204427. The reversal of 420204425 is 524402024.

It can be written as a sum of positive squares in 12 ways, for example, as 145540096 + 274664329 = 12064^2 + 16573^2 .

It is not a de Polignac number, because 420204425 - 2¹⁰ = 420203401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 420204425.

It is not an unprimeable number, because it can be changed into a prime (420204427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351629 + ... + 352821.

It is an arithmetic number, because the mean of its divisors is an integer number (22140541).

Almost surely, 2^420204425 is an apocalyptic number.

It is an amenable number.

420204425 is a deficient number, since it is larger than the sum of its proper divisors (111168559).

420204425 is a wasteful number, since it uses less digits than its factorization.

420204425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469 (or 1464 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 420204425 is about 20498.8883844954. Note that the first 3 decimals coincide. The cubic root of 420204425 is about 749.0087200255.

Adding to 420204425 its reverse (524402024), we get a palindrome (944606449).

The spelling of 420204425 in words is "four hundred twenty million, two hundred four thousand, four hundred twenty-five".