It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 240 726 is not a prime number.
For example, 240 726 can be divided by 2: 240 726 / 2 = 120 363.
For 240 726 to be a prime number, it would have been required that 240 726 has only two divisors, i.e., itself and 1.
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240 726 is an even number, because it is evenly divisible by 2: 240 726 / 2 = 120 363.
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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 240 726 is about 490.638.
Thus, the square root of 240 726 is not an integer, and therefore 240 726 is not a square number.
The square of a number (here 240 726) is the result of the product of this number (240 726) by itself (i.e., 240 726 × 240 726); the square of 240 726 is sometimes called "raising 240 726 to the power 2", or "240 726 squared".
The square of 240 726 is 57 949 007 076 because 240 726 × 240 726 = 240 7262 = 57 949 007 076.
As a consequence, 240 726 is the square root of 57 949 007 076.
The multiples of 240 726 are all integers evenly divisible by 240 726, that is all numbers such that the remainder of the division by 240 726 is zero. There are infinitely many multiples of 240 726. The smallest multiples of 240 726 are: