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In addition we can say of the number **1222 that it is even**

1222 is an even number, as it is divisible by 2 : 1222/2 = 611

The factors for 1222 are all the numbers between -1222 and 1222 , which divide 1222 without leaving any remainder. Since 1222 divided by -1222 is an integer, -1222 is a factor of 1222 .

Since 1222 divided by -1222 is a whole number, -1222 is a factor of 1222

Since 1222 divided by -611 is a whole number, -611 is a factor of 1222

Since 1222 divided by -94 is a whole number, -94 is a factor of 1222

Since 1222 divided by -47 is a whole number, -47 is a factor of 1222

Since 1222 divided by -26 is a whole number, -26 is a factor of 1222

Since 1222 divided by -13 is a whole number, -13 is a factor of 1222

Since 1222 divided by -2 is a whole number, -2 is a factor of 1222

Since 1222 divided by -1 is a whole number, -1 is a factor of 1222

Since 1222 divided by 1 is a whole number, 1 is a factor of 1222

Since 1222 divided by 2 is a whole number, 2 is a factor of 1222

Since 1222 divided by 13 is a whole number, 13 is a factor of 1222

Since 1222 divided by 26 is a whole number, 26 is a factor of 1222

Since 1222 divided by 47 is a whole number, 47 is a factor of 1222

Since 1222 divided by 94 is a whole number, 94 is a factor of 1222

Since 1222 divided by 611 is a whole number, 611 is a factor of 1222

Multiples of 1222 are all integers divisible by 1222 , i.e. the remainder of the full division by 1222 is zero. There are infinite multiples of 1222. The smallest multiples of 1222 are:

0 : in fact, 0 is divisible by any integer, so it is also a multiple of 1222 since 0 × 1222 = 0

1222 : in fact, 1222 is a multiple of itself, since 1222 is divisible by 1222 (it was 1222 / 1222 = 1, so the rest of this division is zero)

2444: in fact, 2444 = 1222 × 2

3666: in fact, 3666 = 1222 × 3

4888: in fact, 4888 = 1222 × 4

6110: in fact, 6110 = 1222 × 5

etc.

It is possible to determine using mathematical techniques whether an integer is prime or not.

for 1222, the answer is:
**No, 1222 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 1222). 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 34.957 ). 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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