421250013225 has 36 divisors (see below), whose sum is σ = 780523025100. Its totient is φ = 216919543680.

The previous prime is 421250013187. The next prime is 421250013257. The reversal of 421250013225 is 522310052124.

421250013225 is a `hidden beast` number, since 4 + 2 + 1 + 2 + 500 + 132 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 31859037081 + 389390976144 = 178491^2 + 624012^2 .

It is not a de Polignac number, because 421250013225 - 2⁶ = 421250013161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32273170 + ... + 32286219.

Almost surely, 2^421250013225 is an apocalyptic number.

421250013225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421250013225 is a deficient number, since it is larger than the sum of its proper divisors (359273011875).

421250013225 is a wasteful number, since it uses less digits than its factorization.

421250013225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64559434 (or 64559426 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 421250013225 its reverse (522310052124), we get a palindrome (943560065349).

The spelling of 421250013225 in words is "four hundred twenty-one billion, two hundred fifty million, thirteen thousand, two hundred twenty-five".