4448921 has 2 divisors, whose sum is σ = 4448922. Its totient is φ = 4448920.

The previous prime is 4448881. The next prime is 4448929. The reversal of 4448921 is 1298444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2758921 + 1690000 = 1661^2 + 1300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4448921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4448929) 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, 2224460 + 2224461.

It is an arithmetic number, because the mean of its divisors is an integer number (2224461).

Almost surely, 2^4448921 is an apocalyptic number.

It is an amenable number.

4448921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4448921 is an equidigital number, since it uses as much as digits as its factorization.

4448921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 32.

The square root of 4448921 is about 2109.2465479408. The cubic root of 4448921 is about 164.4693204427.

The spelling of 4448921 in words is "four million, four hundred forty-eight thousand, nine hundred twenty-one".