It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 720 234 is not a prime number.
For example, 720 234 can be divided by 2: 720 234 / 2 = 360 117.
For 720 234 to be a prime number, it would have been required that 720 234 has only two divisors, i.e., itself and 1.
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720 234 is an even number, because it is evenly divisible by 2: 720 234 / 2 = 360 117.
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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 720 234 is about 848.666.
Thus, the square root of 720 234 is not an integer, and therefore 720 234 is not a square number.
The square of a number (here 720 234) is the result of the product of this number (720 234) by itself (i.e., 720 234 × 720 234); the square of 720 234 is sometimes called "raising 720 234 to the power 2", or "720 234 squared".
The square of 720 234 is 518 737 014 756 because 720 234 × 720 234 = 720 2342 = 518 737 014 756.
As a consequence, 720 234 is the square root of 518 737 014 756.
The multiples of 720 234 are all integers evenly divisible by 720 234, that is all numbers such that the remainder of the division by 720 234 is zero. There are infinitely many multiples of 720 234. The smallest multiples of 720 234 are: