8130681 has 12 divisors (see below), whose sum is σ = 12647908. Its totient is φ = 5003424.

The previous prime is 8130673. The next prime is 8130697. The reversal of 8130681 is 1860318.

It can be written as a sum of positive squares in 2 ways, for example, as 5103081 + 3027600 = 2259^2 + 1740^2 .

It is not a de Polignac number, because 8130681 - 2³ = 8130673 is a prime.

It is a super-2 number, since 2×8130681² = 132215947047522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8130611) 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 in 11 ways as a sum of consecutive naturals, for example, 34630 + ... + 34863.

Almost surely, 2^8130681 is an apocalyptic number.

It is an amenable number.

8130681 is a deficient number, since it is larger than the sum of its proper divisors (4517227).

8130681 is a wasteful number, since it uses less digits than its factorization.

8130681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69512 (or 69509 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 8130681 is about 2851.4349019397. The cubic root of 8130681 is about 201.0831318709.

Adding to 8130681 its reverse (1860318), we get a palindrome (9990999).

The spelling of 8130681 in words is "eight million, one hundred thirty thousand, six hundred eighty-one".