8130581 has 2 divisors, whose sum is σ = 8130582. Its totient is φ = 8130580.

The previous prime is 8130553. The next prime is 8130583. The reversal of 8130581 is 1850318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7890481 + 240100 = 2809^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 8130581 - 2¹⁸ = 7868437 is a prime.

It is a super-2 number, since 2×8130581² = 132212694795122, which contains 22 as substring.

Together with 8130583, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8130581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8130583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4065290 + 4065291.

It is an arithmetic number, because the mean of its divisors is an integer number (4065291).

Almost surely, 2^8130581 is an apocalyptic number.

It is an amenable number.

8130581 is a deficient number, since it is larger than the sum of its proper divisors (1).

8130581 is an equidigital number, since it uses as much as digits as its factorization.

8130581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 8130581 is about 2851.4173668546. The cubic root of 8130581 is about 201.0823074875.

Adding to 8130581 its reverse (1850318), we get a palindrome (9980899).

The spelling of 8130581 in words is "eight million, one hundred thirty thousand, five hundred eighty-one".