7642681 has 2 divisors, whose sum is σ = 7642682. Its totient is φ = 7642680.

The previous prime is 7642669. The next prime is 7642711. The reversal of 7642681 is 1862467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7513081 + 129600 = 2741^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 7642681 - 2⁹ = 7642169 is a prime.

It is a super-2 number, since 2×7642681² = 116821145735522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7642181) 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, 3821340 + 3821341.

It is an arithmetic number, because the mean of its divisors is an integer number (3821341).

Almost surely, 2^7642681 is an apocalyptic number.

It is an amenable number.

7642681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7642681 is an equidigital number, since it uses as much as digits as its factorization.

7642681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 7642681 is about 2764.5399255572. The cubic root of 7642681 is about 196.9768755012.

The spelling of 7642681 in words is "seven million, six hundred forty-two thousand, six hundred eighty-one".