1421is an odd number,as it is not divisible by 2
The factors for 1421 are all the numbers between -1421 and 1421 , which divide 1421 without leaving any remainder. Since 1421 divided by -1421 is an integer, -1421 is a factor of 1421 .
Since 1421 divided by -1421 is a whole number, -1421 is a factor of 1421
Since 1421 divided by -203 is a whole number, -203 is a factor of 1421
Since 1421 divided by -49 is a whole number, -49 is a factor of 1421
Since 1421 divided by -29 is a whole number, -29 is a factor of 1421
Since 1421 divided by -7 is a whole number, -7 is a factor of 1421
Since 1421 divided by -1 is a whole number, -1 is a factor of 1421
Multiples of 1421 are all integers divisible by 1421 , i.e. the remainder of the full division by 1421 is zero. There are infinite multiples of 1421. The smallest multiples of 1421 are:
It is possible to determine using mathematical techniques whether an integer is prime or not.
for 1421, the answer is: No, 1421 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 1421). 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 37.696 ). 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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Next prime number: 1423