4440721 has 2 divisors, whose sum is σ = 4440722. Its totient is φ = 4440720.

The previous prime is 4440707. The next prime is 4440727. The reversal of 4440721 is 1270444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4260096 + 180625 = 2064^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 4440721 - 2⁹ = 4440209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4440692 and 4440701.

It is not a weakly prime, because it can be changed into another prime (4440727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2220360 + 2220361.

It is an arithmetic number, because the mean of its divisors is an integer number (2220361).

Almost surely, 2^4440721 is an apocalyptic number.

It is an amenable number.

4440721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4440721 is an equidigital number, since it uses as much as digits as its factorization.

4440721 is an odious number, because the sum of its binary digits is odd.

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

The square root of 4440721 is about 2107.3018293543. The cubic root of 4440721 is about 164.3682114426.

The spelling of 4440721 in words is "four million, four hundred forty thousand, seven hundred twenty-one".