7248821 has 2 divisors, whose sum is σ = 7248822. Its totient is φ = 7248820.

The previous prime is 7248793. The next prime is 7248833. The reversal of 7248821 is 1288427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7214596 + 34225 = 2686^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 7248821 - 2²² = 3054517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7248881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3624410 + 3624411.

It is an arithmetic number, because the mean of its divisors is an integer number (3624411).

Almost surely, 2^7248821 is an apocalyptic number.

It is an amenable number.

7248821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7248821 is an equidigital number, since it uses as much as digits as its factorization.

7248821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 32.

The square root of 7248821 is about 2692.3634598620. The cubic root of 7248821 is about 193.5333400522.

The spelling of 7248821 in words is "seven million, two hundred forty-eight thousand, eight hundred twenty-one".