421143320025 has 36 divisors (see below), whose sum is σ = 754538423340. Its totient is φ = 224543088000.

The previous prime is 421143320011. The next prime is 421143320027. The reversal of 421143320025 is 520023341124.

421143320025 is a `hidden beast` number, since 4 + 2 + 1 + 1 + 433 + 200 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 21319796169 + 399823523856 = 146013^2 + 632316^2 .

It is not a de Polignac number, because 421143320025 - 2⁴ = 421143320009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421143320027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 486375 + ... + 1038675.

Almost surely, 2^421143320025 is an apocalyptic number.

421143320025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421143320025 is a deficient number, since it is larger than the sum of its proper divisors (333395103315).

421143320025 is a wasteful number, since it uses less digits than its factorization.

421143320025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555706 (or 555698 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 421143320025 its reverse (520023341124), we get a palindrome (941166661149).

The spelling of 421143320025 in words is "four hundred twenty-one billion, one hundred forty-three million, three hundred twenty thousand, twenty-five".