421530000 has 100 divisors (see below), whose sum is σ = 1360851888. Its totient is φ = 112400000.

The previous prime is 421529951. The next prime is 421530001. The reversal of 421530000 is 35124.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (421530001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22975 + ... + 37025.

Almost surely, 2^421530000 is an apocalyptic number.

421530000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421530000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (680425944).

421530000 is an abundant number, since it is smaller than the sum of its proper divisors (939321888).

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

421530000 is a wasteful number, since it uses less digits than its factorization.

421530000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14082 (or 14061 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 421530000 is about 20531.1957761841. The cubic root of 421530000 is about 749.7954998002.

Adding to 421530000 its reverse (35124), we get a palindrome (421565124).

The spelling of 421530000 in words is "four hundred twenty-one million, five hundred thirty thousand".