421320530 has 8 divisors (see below), whose sum is σ = 758376972. Its totient is φ = 168528208.

The previous prime is 421320527. The next prime is 421320539. The reversal of 421320530 is 35023124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 396049801 + 25270729 = 19901^2 + 5027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (421320539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21066017 + ... + 21066036.

Almost surely, 2^421320530 is an apocalyptic number.

421320530 is a deficient number, since it is larger than the sum of its proper divisors (337056442).

421320530 is a wasteful number, since it uses less digits than its factorization.

421320530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42132060.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 421320530 is about 20526.0938807168. The cubic root of 421320530 is about 749.6712811314.

Adding to 421320530 its reverse (35023124), we get a palindrome (456343654).

The spelling of 421320530 in words is "four hundred twenty-one million, three hundred twenty thousand, five hundred thirty".