421224100 has 72 divisors (see below), whose sum is σ = 1003560768. Its totient is φ = 152188800.

The previous prime is 421224077. The next prime is 421224121. The reversal of 421224100 is 1422124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182554 + ... + 184846.

It is an arithmetic number, because the mean of its divisors is an integer number (13938344).

Almost surely, 2^421224100 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 421224100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501780384).

421224100 is an abundant number, since it is smaller than the sum of its proper divisors (582336668).

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

421224100 is a wasteful number, since it uses less digits than its factorization.

421224100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485 (or 2478 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 421224100 is about 20523.7447850045. The cubic root of 421224100 is about 749.6140829396.

Adding to 421224100 its reverse (1422124), we get a palindrome (422646224).

The spelling of 421224100 in words is "four hundred twenty-one million, two hundred twenty-four thousand, one hundred".