260581 has 2 divisors, whose sum is σ = 260582. Its totient is φ = 260580.

The previous prime is 260573. The next prime is 260587. The reversal of 260581 is 185062.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202500 + 58081 = 450^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 260581 - 2³ = 260573 is a prime.

It is a super-2 number, since 2×260581² = 135804915122, which contains 22 as substring.

It is a Chen prime.

It is equal to p₂₂₈₈₂ and since 260581 and 22882 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 (260587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130290 + 130291.

It is an arithmetic number, because the mean of its divisors is an integer number (130291).

2²⁶⁰⁵⁸¹ is an apocalyptic number.

It is an amenable number.

260581 is a deficient number, since it is larger than the sum of its proper divisors (1).

260581 is an equidigital number, since it uses as much as digits as its factorization.

260581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 260581 is about 510.4713508122. The cubic root of 260581 is about 63.8725490945.

It can be divided in two parts, 260 and 581, that added together give a square (841 = 29²).

The spelling of 260581 in words is "two hundred sixty thousand, five hundred eighty-one".