1142 has 4 divisors (see below), whose sum is σ = 1716. Its totient is φ = 570.

The previous prime is 1129. The next prime is 1151. The reversal of 1142 is 2411.

1142 is nontrivially palindromic in base 11.

1142 is digitally balanced in base 5, 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.

1142 is an undulating number in base 11.

1142 is strictly pandigital in base 5.

It is a plaindrome in base 13.

It is a nialpdrome in base 7.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284 + ... + 287.

It is an arithmetic number, because the mean of its divisors is an integer number (429).

1142 is a deficient number, since it is larger than the sum of its proper divisors (574).

1142 is an equidigital number, since it uses as much as digits as its factorization.

1142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573.

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

The square root of 1142 is about 33.7934904974. The cubic root of 1142 is about 10.4525447280.

Adding to 1142 its reverse (2411), we get a palindrome (3553).

The spelling of 1142 in words is "one thousand, one hundred forty-two", and thus it is an iban number.