4343221 has 2 divisors, whose sum is σ = 4343222. Its totient is φ = 4343220.

The previous prime is 4343219. The next prime is 4343249. The reversal of 4343221 is 1223434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2842596 + 1500625 = 1686^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 4343221 - 2¹ = 4343219 is a prime.

Together with 4343219, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 4⁷ + 3⁶ + 4¹¹ + 3⁶ + 2 + 2¹⁷ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4343291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2171610 + 2171611.

It is an arithmetic number, because the mean of its divisors is an integer number (2171611).

Almost surely, 2^4343221 is an apocalyptic number.

It is an amenable number.

4343221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4343221 is an equidigital number, since it uses as much as digits as its factorization.

4343221 is an evil number, because the sum of its binary digits is even.

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

The square root of 4343221 is about 2084.0395869561. The cubic root of 4343221 is about 163.1563481588.

Adding to 4343221 its reverse (1223434), we get a palindrome (5566655).

It can be divided in two parts, 434 and 3221, that added together give a triangular number (3655 = T₈₅).

The spelling of 4343221 in words is "four million, three hundred forty-three thousand, two hundred twenty-one".