In addition we can say of the number 142 that it is even
142 is an even number, as it is divisible by 2 : 142/2 = 71
The factors for 142 are all the numbers between -142 and 142 , which divide 142 without leaving any remainder. Since 142 divided by -142 is an integer, -142 is a factor of 142 .
Since 142 divided by -142 is a whole number, -142 is a factor of 142
Since 142 divided by -71 is a whole number, -71 is a factor of 142
Since 142 divided by -2 is a whole number, -2 is a factor of 142
Since 142 divided by -1 is a whole number, -1 is a factor of 142
Since 142 divided by 1 is a whole number, 1 is a factor of 142
Since 142 divided by 2 is a whole number, 2 is a factor of 142
Since 142 divided by 71 is a whole number, 71 is a factor of 142
Multiples of 142 are all integers divisible by 142 , i.e. the remainder of the full division by 142 is zero. There are infinite multiples of 142. The smallest multiples of 142 are:
0 : in fact, 0 is divisible by any integer, so it is also a multiple of 142 since 0 × 142 = 0
142 : in fact, 142 is a multiple of itself, since 142 is divisible by 142 (it was 142 / 142 = 1, so the rest of this division is zero)
It is possible to determine using mathematical techniques whether an integer is prime or not.
for 142, the answer is: No, 142 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 142). 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 11.916 ). 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.
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