260810581 has 2 divisors, whose sum is σ = 260810582. Its totient is φ = 260810580.

The previous prime is 260810579. The next prime is 260810591. The reversal of 260810581 is 185018062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257313681 + 3496900 = 16041^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 260810581 - 2¹ = 260810579 is a prime.

It is a super-2 number, since 2×260810581² = 136044318323115122, which contains 22 as substring.

Together with 260810579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260810591) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130405290 + 130405291.

It is an arithmetic number, because the mean of its divisors is an integer number (130405291).

Almost surely, 2^260810581 is an apocalyptic number.

It is an amenable number.

260810581 is a deficient number, since it is larger than the sum of its proper divisors (1).

260810581 is an equidigital number, since it uses as much as digits as its factorization.

260810581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 260810581 is about 16149.6309864963. The cubic root of 260810581 is about 638.9130157369.

The spelling of 260810581 in words is "two hundred sixty million, eight hundred ten thousand, five hundred eighty-one".