7115681 has 2 divisors, whose sum is σ = 7115682. Its totient is φ = 7115680.

The previous prime is 7115657. The next prime is 7115687. The reversal of 7115681 is 1865117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7102225 + 13456 = 2665^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 7115681 - 2⁶ = 7115617 is a prime.

It is a super-2 number, since 2×7115681² = 101265832187522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7115687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3557840 + 3557841.

It is an arithmetic number, because the mean of its divisors is an integer number (3557841).

Almost surely, 2^7115681 is an apocalyptic number.

It is an amenable number.

7115681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7115681 is an equidigital number, since it uses as much as digits as its factorization.

7115681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 29.

The square root of 7115681 is about 2667.5233832152. The cubic root of 7115681 is about 192.3411271384.

The spelling of 7115681 in words is "seven million, one hundred fifteen thousand, six hundred eighty-one".