7841420024257 has 2 divisors, whose sum is σ = 7841420024258. Its totient is φ = 7841420024256.

The previous prime is 7841420024237. The next prime is 7841420024267. The reversal of 7841420024257 is 7524200241487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4991667513616 + 2849752510641 = 2234204^2 + 1688121^2 .

It is a cyclic number.

It is not a de Polignac number, because 7841420024257 - 2⁷ = 7841420024129 is a prime.

It is a super-2 number, since 2×7841420024257² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7841420024237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3920710012128 + 3920710012129.

It is an arithmetic number, because the mean of its divisors is an integer number (3920710012129).

Almost surely, 2^{7841420024257} is an apocalyptic number.

It is an amenable number.

7841420024257 is a deficient number, since it is larger than the sum of its proper divisors (1).

7841420024257 is an equidigital number, since it uses as much as digits as its factorization.

7841420024257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1003520, while the sum is 46.

The spelling of 7841420024257 in words is "seven trillion, eight hundred forty-one billion, four hundred twenty million, twenty-four thousand, two hundred fifty-seven".