It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 740 509 is not a prime number.
For example, 740 509 can be divided by 7: 740 509 / 7 = 105 787.
For 740 509 to be a prime number, it would have been required that 740 509 has only two divisors, i.e., itself and 1.
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740 509 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 740 509 is about 860.528.
Thus, the square root of 740 509 is not an integer, and therefore 740 509 is not a square number.
The square of a number (here 740 509) is the result of the product of this number (740 509) by itself (i.e., 740 509 × 740 509); the square of 740 509 is sometimes called "raising 740 509 to the power 2", or "740 509 squared".
The square of 740 509 is 548 353 579 081 because 740 509 × 740 509 = 740 5092 = 548 353 579 081.
As a consequence, 740 509 is the square root of 548 353 579 081.
The multiples of 740 509 are all integers evenly divisible by 740 509, that is all numbers such that the remainder of the division by 740 509 is zero. There are infinitely many multiples of 740 509. The smallest multiples of 740 509 are: