421405325 has 24 divisors (see below), whose sum is σ = 571677696. Its totient is φ = 305600000.

The previous prime is 421405307. The next prime is 421405331. The reversal of 421405325 is 523504124.

It is a happy number.

It is not a de Polignac number, because 421405325 - 2¹⁸ = 421143181 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421405294 and 421405303.

It is a congruent number.

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, 103325 + ... + 107325.

It is an arithmetic number, because the mean of its divisors is an integer number (23819904).

Almost surely, 2^421405325 is an apocalyptic number.

It is an amenable number.

421405325 is a deficient number, since it is larger than the sum of its proper divisors (150272371).

421405325 is a wasteful number, since it uses less digits than its factorization.

421405325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405 (or 4400 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 421405325 is about 20528.1593183607. The cubic root of 421405325 is about 749.7215707230.

Adding to 421405325 its reverse (523504124), we get a palindrome (944909449).

The spelling of 421405325 in words is "four hundred twenty-one million, four hundred five thousand, three hundred twenty-five".