421043425 has 24 divisors (see below), whose sum is σ = 575989920. Its totient is φ = 302755200.

The previous prime is 421043407. The next prime is 421043429. The reversal of 421043425 is 524340124.

It is a happy number.

It is not a de Polignac number, because 421043425 - 2⁹ = 421042913 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 421043425.

It is not an unprimeable number, because it can be changed into a prime (421043429) by changing a digit.

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, 15874 + ... + 33076.

It is an arithmetic number, because the mean of its divisors is an integer number (23999580).

Almost surely, 2^421043425 is an apocalyptic number.

It is an amenable number.

421043425 is a deficient number, since it is larger than the sum of its proper divisors (154946495).

421043425 is a wasteful number, since it uses less digits than its factorization.

421043425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17313 (or 17308 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 421043425 is about 20519.3427038977. The cubic root of 421043425 is about 749.5068906768.

Adding to 421043425 its reverse (524340124), we get a palindrome (945383549).

The spelling of 421043425 in words is "four hundred twenty-one million, forty-three thousand, four hundred twenty-five".