421201224 has 48 divisors (see below), whose sum is σ = 1145823120. Its totient is φ = 139776480.

The previous prime is 421201223. The next prime is 421201267. The reversal of 421201224 is 422102124.

421201224 is a `hidden beast` number, since 421 + 20 + 1 + 224 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 421201197 and 421201206.

It is not an unprimeable number, because it can be changed into a prime (421201223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3459 + ... + 29229.

It is an arithmetic number, because the mean of its divisors is an integer number (23871315).

Almost surely, 2^421201224 is an apocalyptic number.

It is an amenable number.

421201224 is an abundant number, since it is smaller than the sum of its proper divisors (724621896).

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

421201224 is a wasteful number, since it uses less digits than its factorization.

421201224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26010 (or 26003 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 421201224 is about 20523.1874717355. The cubic root of 421201224 is about 749.6005125842.

Adding to 421201224 its reverse (422102124), we get a palindrome (843303348).

The spelling of 421201224 in words is "four hundred twenty-one million, two hundred one thousand, two hundred twenty-four".