421503300 has 108 divisors (see below), whose sum is σ = 1334547396. Its totient is φ = 111264000.

The previous prime is 421503289. The next prime is 421503307. The reversal of 421503300 is 3305124.

It can be written as a sum of positive squares in 6 ways, for example, as 186624 + 421316676 = 432^2 + 20526^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (421503307) 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 35 ways as a sum of consecutive naturals, for example, 88582 + ... + 93218.

Almost surely, 2^421503300 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421503300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667273698).

421503300 is an abundant number, since it is smaller than the sum of its proper divisors (913044096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421503300 is a wasteful number, since it uses less digits than its factorization.

421503300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4758 (or 4748 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 421503300 is about 20530.5455358595. The cubic root of 421503300 is about 749.7796686118.

Adding to 421503300 its reverse (3305124), we get a palindrome (424808424).

The spelling of 421503300 in words is "four hundred twenty-one million, five hundred three thousand, three hundred".