11599 has 4 divisors (see below), whose sum is σ = 13264. Its totient is φ = 9936.

The previous prime is 11597. The next prime is 11617. The reversal of 11599 is 99511.

11599 = 22² + 23² + ... + 35².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99511 = 191 ⋅521.

It is a cyclic number.

It is not a de Polignac number, because 11599 - 2¹ = 11597 is a prime.

It is a Duffinian number.

11599 is a lucky 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 (11593) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822 + ... + 835.

It is an arithmetic number, because the mean of its divisors is an integer number (3316).

2¹¹⁵⁹⁹ is an apocalyptic number.

11599 is a deficient number, since it is larger than the sum of its proper divisors (1665).

11599 is an equidigital number, since it uses as much as digits as its factorization.

11599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664.

The product of its digits is 405, while the sum is 25.

The square root of 11599 is about 107.6986536592. The cubic root of 11599 is about 22.6363734114.

It can be divided in two parts, 1 and 1599, that added together give a square (1600 = 40²).

The spelling of 11599 in words is "eleven thousand, five hundred ninety-nine".