4243321 has 2 divisors, whose sum is σ = 4243322. Its totient is φ = 4243320.

The previous prime is 4243307. The next prime is 4243357. The reversal of 4243321 is 1233424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3367225 + 876096 = 1835^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 4243321 - 2¹³ = 4235129 is a prime.

It is not a weakly prime, because it can be changed into another prime (4243361) by changing a digit.

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 as a sum of consecutive naturals, namely, 2121660 + 2121661.

It is an arithmetic number, because the mean of its divisors is an integer number (2121661).

Almost surely, 2^4243321 is an apocalyptic number.

It is an amenable number.

4243321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243321 is an equidigital number, since it uses as much as digits as its factorization.

4243321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 19.

The square root of 4243321 is about 2059.9322804403. The cubic root of 4243321 is about 161.8956931552.

Adding to 4243321 its reverse (1233424), we get a palindrome (5476745).

The spelling of 4243321 in words is "four million, two hundred forty-three thousand, three hundred twenty-one".