421001224 has 32 divisors (see below), whose sum is σ = 902851200. Its totient is φ = 180288000.

The previous prime is 421001201. The next prime is 421001227. The reversal of 421001224 is 422100124.

It is a junction number, because it is equal to n+sod(n) for n = 421001198 and 421001207.

It is not an unprimeable number, because it can be changed into a prime (421001227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 103224 + ... + 107224.

It is an arithmetic number, because the mean of its divisors is an integer number (28214100).

Almost surely, 2^421001224 is an apocalyptic number.

It is an amenable number.

421001224 is an abundant number, since it is smaller than the sum of its proper divisors (481849976).

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

421001224 is a wasteful number, since it uses less digits than its factorization.

421001224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893 (or 5889 counting only the distinct ones).

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

The square root of 421001224 is about 20518.3143557165. The cubic root of 421001224 is about 749.4818489232.

Adding to 421001224 its reverse (422100124), we get a palindrome (843101348).

The spelling of 421001224 in words is "four hundred twenty-one million, one thousand, two hundred twenty-four".