4224321 has 6 divisors (see below), whose sum is σ = 6101810. Its totient is φ = 2816208.

The previous prime is 4224317. The next prime is 4224331. The reversal of 4224321 is 1234224.

It can be written as a sum of positive squares in only one way, i.e., 4223025 + 1296 = 2055^2 + 36^2 .

It is not a de Polignac number, because 4224321 - 2² = 4224317 is a prime.

It is a super-2 number, since 2×4224321² = 35689775822082, which contains 22 as substring.

It is a Duffinian number.

4224321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4224294 and 4224303.

It is not an unprimeable number, because it can be changed into a prime (4224331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 234676 + ... + 234693.

Almost surely, 2^4224321 is an apocalyptic number.

It is an amenable number.

4224321 is a deficient number, since it is larger than the sum of its proper divisors (1877489).

4224321 is a wasteful number, since it uses less digits than its factorization.

4224321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469375 (or 469372 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 4224321 is about 2055.3153042782. The cubic root of 4224321 is about 161.6536955382.

Adding to 4224321 its reverse (1234224), we get a palindrome (5458545).

The spelling of 4224321 in words is "four million, two hundred twenty-four thousand, three hundred twenty-one".