421402224 has 20 divisors (see below), whose sum is σ = 1088622536. Its totient is φ = 140467392.

The previous prime is 421402217. The next prime is 421402231. The reversal of 421402224 is 422204124.

It is an interprime number because it is at equal distance from previous prime (421402217) and next prime (421402231).

It is a self number, because there is not a number n which added to its sum of digits gives 421402224.

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 3 ways as a sum of consecutive naturals, for example, 4389559 + ... + 4389654.

Almost surely, 2^421402224 is an apocalyptic number.

It is an amenable number.

421402224 is an abundant number, since it is smaller than the sum of its proper divisors (667220312).

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

421402224 is a wasteful number, since it uses less digits than its factorization.

421402224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8779224 (or 8779218 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 421402224 is about 20528.0837878259. The cubic root of 421402224 is about 749.7197317237.

Adding to 421402224 its reverse (422204124), we get a palindrome (843606348).

The spelling of 421402224 in words is "four hundred twenty-one million, four hundred two thousand, two hundred twenty-four".