115862581 has 2 divisors, whose sum is σ = 115862582. Its totient is φ = 115862580.

The previous prime is 115862491. The next prime is 115862587. The reversal of 115862581 is 185268511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91508356 + 24354225 = 9566^2 + 4935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115862581 is a prime.

It is a super-2 number, since 2×115862581² = 26848275351963122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 115862581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115862587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57931290 + 57931291.

It is an arithmetic number, because the mean of its divisors is an integer number (57931291).

Almost surely, 2^115862581 is an apocalyptic number.

It is an amenable number.

115862581 is a deficient number, since it is larger than the sum of its proper divisors (1).

115862581 is an equidigital number, since it uses as much as digits as its factorization.

115862581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 37.

The square root of 115862581 is about 10763.9482068616. The cubic root of 115862581 is about 487.5072360092.

The spelling of 115862581 in words is "one hundred fifteen million, eight hundred sixty-two thousand, five hundred eighty-one".