4221424 has 20 divisors (see below), whose sum is σ = 8211280. Its totient is φ = 2102400.

The previous prime is 4221421. The next prime is 4221433. The reversal of 4221424 is 4241224.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6724 + ... + 7324.

It is an arithmetic number, because the mean of its divisors is an integer number (410564).

Almost surely, 2^4221424 is an apocalyptic number.

It is an amenable number.

4221424 is a deficient number, since it is larger than the sum of its proper divisors (3989856).

4221424 is a wasteful number, since it uses less digits than its factorization.

4221424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1042 counting only the distinct ones).

The product of its digits is 512, while the sum is 19.

The square root of 4221424 is about 2054.6104253605. The cubic root of 4221424 is about 161.6167335546.

Adding to 4221424 its reverse (4241224), we get a palindrome (8462648).

The spelling of 4221424 in words is "four million, two hundred twenty-one thousand, four hundred twenty-four".