421045100 has 72 divisors (see below), whose sum is σ = 1077931008. Its totient is φ = 139694400.

The previous prime is 421045067. The next prime is 421045127. The reversal of 421045100 is 1540124.

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 23 ways as a sum of consecutive naturals, for example, 11999 + ... + 31401.

It is an arithmetic number, because the mean of its divisors is an integer number (14971264).

Almost surely, 2^421045100 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 421045100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538965504).

421045100 is an abundant number, since it is smaller than the sum of its proper divisors (656885908).

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

421045100 is a wasteful number, since it uses less digits than its factorization.

421045100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19455 (or 19448 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 421045100 is about 20519.3835190047. The cubic root of 421045100 is about 749.5078845746.

Adding to 421045100 its reverse (1540124), we get a palindrome (422585224).

The spelling of 421045100 in words is "four hundred twenty-one million, forty-five thousand, one hundred".