11539 has 4 divisors (see below), whose sum is σ = 12600. Its totient is φ = 10480.

The previous prime is 11527. The next prime is 11549. The reversal of 11539 is 93511.

11539 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 93511 = 11 ⋅8501.

It is a cyclic number.

It is not a de Polignac number, because 11539 - 2⁷ = 11411 is a prime.

It is a Duffinian number.

11539 is a lucky number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514 + ... + 535.

It is an arithmetic number, because the mean of its divisors is an integer number (3150).

2¹¹⁵³⁹ is an apocalyptic number.

11539 is a deficient number, since it is larger than the sum of its proper divisors (1061).

11539 is a wasteful number, since it uses less digits than its factorization.

11539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060.

The product of its digits is 135, while the sum is 19.

The square root of 11539 is about 107.4197374787. The cubic root of 11539 is about 22.5972743208.

It can be divided in two parts, 11 and 539, that multiplied together give a square (5929 = 77²).

The spelling of 11539 in words is "eleven thousand, five hundred thirty-nine".