11142 has 12 divisors (see below), whose sum is σ = 24180. Its totient is φ = 3708.

The previous prime is 11131. The next prime is 11149. The reversal of 11142 is 24111.

It is a happy number.

11142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11149) 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 5 ways as a sum of consecutive naturals, for example, 292 + ... + 327.

It is an arithmetic number, because the mean of its divisors is an integer number (2015).

2¹¹¹⁴² is an apocalyptic number.

11142 is an abundant number, since it is smaller than the sum of its proper divisors (13038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11142 is a wasteful number, since it uses less digits than its factorization.

11142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 624 counting only the distinct ones).

The product of its digits is 8, while the sum is 9.

The square root of 11142 is about 105.5556725146. Note that the first 3 decimals coincide. The cubic root of 11142 is about 22.3350905773.

Adding to 11142 its reverse (24111), we get a palindrome (35253).

It can be divided in two parts, 111 and 42, that added together give a triangular number (153 = T₁₇).

The spelling of 11142 in words is "eleven thousand, one hundred forty-two", and thus it is an iban number.