421201500 has 96 divisors (see below), whose sum is σ = 1291180800. Its totient is φ = 106401600.

The previous prime is 421201493. The next prime is 421201513. The reversal of 421201500 is 5102124.

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

It is a self number, because there is not a number n which added to its sum of digits gives 421201500.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 21111 + ... + 35889.

It is an arithmetic number, because the mean of its divisors is an integer number (13449800).

Almost surely, 2^421201500 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 421201500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645590400).

421201500 is an abundant number, since it is smaller than the sum of its proper divisors (869979300).

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

421201500 is a wasteful number, since it uses less digits than its factorization.

421201500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14820 (or 14808 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 421201500 is about 20523.1941958361. The cubic root of 421201500 is about 749.6006763141.

Adding to 421201500 its reverse (5102124), we get a palindrome (426303624).

The spelling of 421201500 in words is "four hundred twenty-one million, two hundred one thousand, five hundred".