7641281 has 2 divisors, whose sum is σ = 7641282. Its totient is φ = 7641280.

The previous prime is 7641259. The next prime is 7641289. The reversal of 7641281 is 1821467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6330256 + 1311025 = 2516^2 + 1145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7641281 is a prime.

It is a super-2 number, since 2×7641281² = 116778350641922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7641289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820640 + 3820641.

It is an arithmetic number, because the mean of its divisors is an integer number (3820641).

Almost surely, 2^7641281 is an apocalyptic number.

It is an amenable number.

7641281 is a deficient number, since it is larger than the sum of its proper divisors (1).

7641281 is an equidigital number, since it uses as much as digits as its factorization.

7641281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 29.

The square root of 7641281 is about 2764.2867072719. The cubic root of 7641281 is about 196.9648472411.

The spelling of 7641281 in words is "seven million, six hundred forty-one thousand, two hundred eighty-one".