421201530 has 96 divisors (see below), whose sum is σ = 1160175744. Its totient is φ = 105798528.

The previous prime is 421201513. The next prime is 421201567. The reversal of 421201530 is 35102124.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137172 + ... + 140208.

It is an arithmetic number, because the mean of its divisors is an integer number (12085164).

Almost surely, 2^421201530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421201530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580087872).

421201530 is an abundant number, since it is smaller than the sum of its proper divisors (738974214).

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

421201530 is a wasteful number, since it uses less digits than its factorization.

421201530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 421201530 is about 20523.1949267165. The cubic root of 421201530 is about 749.6006941108.

Adding to 421201530 its reverse (35102124), we get a palindrome (456303654).

The spelling of 421201530 in words is "four hundred twenty-one million, two hundred one thousand, five hundred thirty".