4224821 has 8 divisors (see below), whose sum is σ = 4471200. Its totient is φ = 3980880.

The previous prime is 4224811. The next prime is 4224827. The reversal of 4224821 is 1284224.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4224821 - 2¹⁴ = 4208437 is a prime.

It is a super-2 number, since 2×4224821² = 35698224964082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4224827) 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 7 ways as a sum of consecutive naturals, for example, 3866 + ... + 4836.

It is an arithmetic number, because the mean of its divisors is an integer number (558900).

Almost surely, 2^4224821 is an apocalyptic number.

It is an amenable number.

4224821 is a deficient number, since it is larger than the sum of its proper divisors (246379).

4224821 is a wasteful number, since it uses less digits than its factorization.

4224821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219.

The product of its digits is 1024, while the sum is 23.

The square root of 4224821 is about 2055.4369365174. The cubic root of 4224821 is about 161.6600731832.

The spelling of 4224821 in words is "four million, two hundred twenty-four thousand, eight hundred twenty-one".