2421is an odd number,as it is not divisible by 2
The factors for 2421 are all the numbers between -2421 and 2421 , which divide 2421 without leaving any remainder. Since 2421 divided by -2421 is an integer, -2421 is a factor of 2421 .
Since 2421 divided by -2421 is a whole number, -2421 is a factor of 2421
Since 2421 divided by -807 is a whole number, -807 is a factor of 2421
Since 2421 divided by -269 is a whole number, -269 is a factor of 2421
Since 2421 divided by -9 is a whole number, -9 is a factor of 2421
Since 2421 divided by -3 is a whole number, -3 is a factor of 2421
Since 2421 divided by -1 is a whole number, -1 is a factor of 2421
Multiples of 2421 are all integers divisible by 2421 , i.e. the remainder of the full division by 2421 is zero. There are infinite multiples of 2421. The smallest multiples of 2421 are:
It is possible to determine using mathematical techniques whether an integer is prime or not.
for 2421, the answer is: No, 2421 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 2421). 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 49.204 ). 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: 2417
Next prime number: 2423