7720241 has 2 divisors, whose sum is σ = 7720242. Its totient is φ = 7720240.

The previous prime is 7720211. The next prime is 7720247. The reversal of 7720241 is 1420277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5382400 + 2337841 = 2320^2 + 1529^2 .

It is an emirp because it is prime and its reverse (1420277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7720241 - 2²² = 3525937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7720247) 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, 3860120 + 3860121.

It is an arithmetic number, because the mean of its divisors is an integer number (3860121).

Almost surely, 2^7720241 is an apocalyptic number.

It is an amenable number.

7720241 is a deficient number, since it is larger than the sum of its proper divisors (1).

7720241 is an equidigital number, since it uses as much as digits as its factorization.

7720241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 7720241 is about 2778.5321664505. The cubic root of 7720241 is about 197.6409590305.

The spelling of 7720241 in words is "seven million, seven hundred twenty thousand, two hundred forty-one".