It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 24 021 is not a prime number.
For example, 24 021 can be divided by 3: 24 021 / 3 = 8 007.
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For 24 021 to be a prime number, it would have been required that 24 021 has only two divisors, i.e., itself and 1.
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24 021 is an odd number, because it is not evenly divisible by 2.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 24 021 is about 154.987.
Thus, the square root of 24 021 is not an integer, and therefore 24 021 is not a square number.
The square of a number (here 24 021) is the result of the product of this number (24 021) by itself (i.e., 24 021 × 24 021); the square of 24 021 is sometimes called "raising 24 021 to the power 2", or "24 021 squared".
The square of 24 021 is 577 008 441 because 24 021 × 24 021 = 24 0212 = 577 008 441.
As a consequence, 24 021 is the square root of 577 008 441.
The multiples of 24 021 are all integers evenly divisible by 24 021, that is all numbers such that the remainder of the division by 24 021 is zero. There are infinitely many multiples of 24 021. The smallest multiples of 24 021 are: