In addition we can say of the number 1142 that it is even
1142 is an even number, as it is divisible by 2 : 1142/2 = 571
The factors for 1142 are all the numbers between -1142 and 1142 , which divide 1142 without leaving any remainder. Since 1142 divided by -1142 is an integer, -1142 is a factor of 1142 .
Since 1142 divided by -1142 is a whole number, -1142 is a factor of 1142
Since 1142 divided by -571 is a whole number, -571 is a factor of 1142
Since 1142 divided by -2 is a whole number, -2 is a factor of 1142
Since 1142 divided by -1 is a whole number, -1 is a factor of 1142
Multiples of 1142 are all integers divisible by 1142 , i.e. the remainder of the full division by 1142 is zero. There are infinite multiples of 1142. The smallest multiples of 1142 are:
It is possible to determine using mathematical techniques whether an integer is prime or not.
for 1142, the answer is: No, 1142 is not a prime number.
To know the primality of an integer, we can use several algorithms. The most naive is to try all divisors below the number you want to know if it is prime (in our case 1142). We can already eliminate even numbers bigger than 2 (then 4 , 6 , 8 ...). Besides, we can stop at the square root of the number in question (here 33.793 ). Historically, the Eratosthenes screen (which dates back to Antiquity) uses this technique relatively effectively.
More modern techniques include the Atkin screen, probabilistic tests, or the cyclotomic test.
Previous prime number: 1129
Next prime number: 1151