421603225 has 24 divisors (see below), whose sum is σ = 551214720. Its totient is φ = 319249920.

The previous prime is 421603211. The next prime is 421603253. The reversal of 421603225 is 522306124.

It is not a de Polignac number, because 421603225 - 2⁷ = 421603097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 421603225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51996 + ... + 59554.

It is an arithmetic number, because the mean of its divisors is an integer number (22967280).

Almost surely, 2^421603225 is an apocalyptic number.

It is an amenable number.

421603225 is a deficient number, since it is larger than the sum of its proper divisors (129611495).

421603225 is a wasteful number, since it uses less digits than its factorization.

421603225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7689 (or 7684 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 421603225 is about 20532.9789606866. The cubic root of 421603225 is about 749.8389135522.

Adding to 421603225 its reverse (522306124), we get a palindrome (943909349).

The spelling of 421603225 in words is "four hundred twenty-one million, six hundred three thousand, two hundred twenty-five".