13081 has 4 divisors (see below), whose sum is σ = 13312. Its totient is φ = 12852.

The previous prime is 13063. The next prime is 13093. The reversal of 13081 is 18031.

13081 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 a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13081 - 2⁵ = 13049 is a prime.

It is a super-2 number, since 2×13081² = 342225122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13001) 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, 40 + ... + 166.

It is an arithmetic number, because the mean of its divisors is an integer number (3328).

2¹³⁰⁸¹ is an apocalyptic number.

It is an amenable number.

13081 is a deficient number, since it is larger than the sum of its proper divisors (231).

13081 is a wasteful number, since it uses less digits than its factorization.

13081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 13081 is about 114.3721994193. The cubic root of 13081 is about 23.5620812122.

Subtracting 13081 from its reverse (18031), we obtain a triangular number (4950 = T₉₉).

The spelling of 13081 in words is "thirteen thousand, eighty-one".