7116581 has 2 divisors, whose sum is σ = 7116582. Its totient is φ = 7116580.

The previous prime is 7116563. The next prime is 7116619. The reversal of 7116581 is 1856117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7107556 + 9025 = 2666^2 + 95^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7116581 is a prime.

It is a super-2 number, since 2×7116581² = 101291450259122, which contains 22 as substring.

It is a Chen prime.

It is equal to p₄₈₄₀₉₄ and since 7116581 and 484094 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7116511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3558290 + 3558291.

It is an arithmetic number, because the mean of its divisors is an integer number (3558291).

Almost surely, 2^7116581 is an apocalyptic number.

It is an amenable number.

7116581 is a deficient number, since it is larger than the sum of its proper divisors (1).

7116581 is an equidigital number, since it uses as much as digits as its factorization.

7116581 is an evil number, because the sum of its binary digits is even.

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

The square root of 7116581 is about 2667.6920736847. The cubic root of 7116581 is about 192.3492359766.

The spelling of 7116581 in words is "seven million, one hundred sixteen thousand, five hundred eighty-one".