7448821 has 2 divisors, whose sum is σ = 7448822. Its totient is φ = 7448820.

The previous prime is 7448813. The next prime is 7448863. The reversal of 7448821 is 1288447.

7448821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6100900 + 1347921 = 2470^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 7448821 - 2³ = 7448813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7448521) 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, 3724410 + 3724411.

It is an arithmetic number, because the mean of its divisors is an integer number (3724411).

Almost surely, 2^7448821 is an apocalyptic number.

It is an amenable number.

7448821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7448821 is an equidigital number, since it uses as much as digits as its factorization.

7448821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14336, while the sum is 34.

The square root of 7448821 is about 2729.2528281565. The cubic root of 7448821 is about 195.2971231969.

The spelling of 7448821 in words is "seven million, four hundred forty-eight thousand, eight hundred twenty-one".