4323721 has 2 divisors, whose sum is σ = 4323722. Its totient is φ = 4323720.

The previous prime is 4323713. The next prime is 4323731. The reversal of 4323721 is 1273234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3024121 + 1299600 = 1739^2 + 1140^2 .

It is a cyclic number.

It is not a de Polignac number, because 4323721 - 2³ = 4323713 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4323692 and 4323701.

It is not a weakly prime, because it can be changed into another prime (4323731) 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 as a sum of consecutive naturals, namely, 2161860 + 2161861.

It is an arithmetic number, because the mean of its divisors is an integer number (2161861).

Almost surely, 2^4323721 is an apocalyptic number.

It is an amenable number.

4323721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4323721 is an equidigital number, since it uses as much as digits as its factorization.

4323721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 22.

The square root of 4323721 is about 2079.3559098913. The cubic root of 4323721 is about 162.9118044466.

Adding to 4323721 its reverse (1273234), we get a palindrome (5596955).

The spelling of 4323721 in words is "four million, three hundred twenty-three thousand, seven hundred twenty-one".