4724221 has 2 divisors, whose sum is σ = 4724222. Its totient is φ = 4724220.

The previous prime is 4724219. The next prime is 4724227. The reversal of 4724221 is 1224274.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4347225 + 376996 = 2085^2 + 614^2 .

It is a cyclic number.

It is not a de Polignac number, because 4724221 - 2¹ = 4724219 is a prime.

Together with 4724219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4724192 and 4724201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4724227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2362110 + 2362111.

It is an arithmetic number, because the mean of its divisors is an integer number (2362111).

Almost surely, 2^4724221 is an apocalyptic number.

It is an amenable number.

4724221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4724221 is an equidigital number, since it uses as much as digits as its factorization.

4724221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 22.

The square root of 4724221 is about 2173.5273175187. The cubic root of 4724221 is about 167.7941190203.

Adding to 4724221 its reverse (1224274), we get a palindrome (5948495).

The spelling of 4724221 in words is "four million, seven hundred twenty-four thousand, two hundred twenty-one".