259581 has 16 divisors (see below), whose sum is σ = 405504. Its totient is φ = 144624.

The previous prime is 259577. The next prime is 259583. The reversal of 259581 is 185952.

It is not a de Polignac number, because 259581 - 2² = 259577 is a prime.

It is a super-2 number, since 2×259581² = 134764591122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 856 + ... + 1118.

It is an arithmetic number, because the mean of its divisors is an integer number (25344).

2²⁵⁹⁵⁸¹ is an apocalyptic number.

259581 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

259581 is a deficient number, since it is larger than the sum of its proper divisors (145923).

259581 is a wasteful number, since it uses less digits than its factorization.

259581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320.

The product of its digits is 3600, while the sum is 30.

The square root of 259581 is about 509.4909223921. The cubic root of 259581 is about 63.7907390508.

The spelling of 259581 in words is "two hundred fifty-nine thousand, five hundred eighty-one".