11559 has 4 divisors (see below), whose sum is σ = 15416.
Its totient is φ = 7704.
The previous prime is 11551. The next prime is 11579. The reversal of 11559 is 95511.
It is a happy number.
11559 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 11559 - 23 = 11551 is a prime.
It is a super-2 number, since 2×115592 = 267220962, which contains 22 as substring.
It is a D-number.
It is a Duffinian number.
It is a plaindrome in base 10.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (11551) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1924 + ... + 1929.
It is an arithmetic number, because the mean of its divisors is an integer number (3854).
211559 is an apocalyptic number.
11559 is a deficient number, since it is larger than the sum of its proper divisors (3857).
11559 is an equidigital number, since it uses as much as digits as its factorization.
11559 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3856.
The product of its digits is 225, while the sum is 21.
The square root of 11559 is about 107.5127899368.
The cubic root of 11559 is about 22.6103223789.
The spelling of 11559 in words is "eleven thousand, five hundred fifty-nine".