11139 has 8 divisors (see below), whose sum is σ = 15360. Its totient is φ = 7176.

The previous prime is 11131. The next prime is 11149. The reversal of 11139 is 93111.

11139 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

11139 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11139 - 2³ = 11131 is a prime.

It is a plaindrome in base 10 and base 15.

It is a nialpdrome in base 7 and base 12.

It is not an unprimeable number, because it can be changed into a prime (11131) 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 7 ways as a sum of consecutive naturals, for example, 102 + ... + 180.

It is an arithmetic number, because the mean of its divisors is an integer number (1920).

2¹¹¹³⁹ is an apocalyptic number.

11139 is a deficient number, since it is larger than the sum of its proper divisors (4221).

11139 is an equidigital number, since it uses as much as digits as its factorization.

11139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129.

The product of its digits is 27, while the sum is 15.

The square root of 11139 is about 105.5414610473. The cubic root of 11139 is about 22.3330858120. Note that the first 3 decimals are identical.

The spelling of 11139 in words is "eleven thousand, one hundred thirty-nine".