11885 has 4 divisors (see below), whose sum is σ = 14268. Its totient is φ = 9504.

The previous prime is 11867. The next prime is 11887. The reversal of 11885 is 58811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58811 = 23 ⋅2557.

It can be written as a sum of positive squares in 2 ways, for example, as 4489 + 7396 = 67^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 11885 - 2⁶ = 11821 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 11885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11887) 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, 1184 + ... + 1193.

It is an arithmetic number, because the mean of its divisors is an integer number (3567).

2¹¹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

11885 is a deficient number, since it is larger than the sum of its proper divisors (2383).

11885 is an equidigital number, since it uses as much as digits as its factorization.

11885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382.

The product of its digits is 320, while the sum is 23.

The square root of 11885 is about 109.0183470797. The cubic root of 11885 is about 22.8209154540.

The spelling of 11885 in words is "eleven thousand, eight hundred eighty-five".