It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 24 409 is not a prime number.
For example, 24 409 can be divided by 7: 24 409 / 7 = 3 487.
For 24 409 to be a prime number, it would have been required that 24 409 has only two divisors, i.e., itself and 1.
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24 409 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 24 409 is about 156.234.
Thus, the square root of 24 409 is not an integer, and therefore 24 409 is not a square number.
The square of a number (here 24 409) is the result of the product of this number (24 409) by itself (i.e., 24 409 × 24 409); the square of 24 409 is sometimes called "raising 24 409 to the power 2", or "24 409 squared".
The square of 24 409 is 595 799 281 because 24 409 × 24 409 = 24 4092 = 595 799 281.
As a consequence, 24 409 is the square root of 595 799 281.
The multiples of 24 409 are all integers evenly divisible by 24 409, that is all numbers such that the remainder of the division by 24 409 is zero. There are infinitely many multiples of 24 409. The smallest multiples of 24 409 are: