421313225 has 6 divisors (see below), whose sum is σ = 522428430. Its totient is φ = 337050560.

The previous prime is 421313213. The next prime is 421313251. The reversal of 421313225 is 522313124.

It can be written as a sum of positive squares in 3 ways, for example, as 5683456 + 415629769 = 2384^2 + 20387^2 .

It is not a de Polignac number, because 421313225 - 2⁴ = 421313209 is a prime.

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 421313225.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8426240 + ... + 8426289.

It is an arithmetic number, because the mean of its divisors is an integer number (87071405).

Almost surely, 2^421313225 is an apocalyptic number.

It is an amenable number.

421313225 is a deficient number, since it is larger than the sum of its proper divisors (101115205).

421313225 is a wasteful number, since it uses less digits than its factorization.

421313225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16852539 (or 16852534 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 421313225 is about 20525.9159357141. The cubic root of 421313225 is about 749.6669484204. Note that the first 3 decimals are identical.

Adding to 421313225 its reverse (522313124), we get a palindrome (943626349).

The spelling of 421313225 in words is "four hundred twenty-one million, three hundred thirteen thousand, two hundred twenty-five".