It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 239 742 is not a prime number.
For example, 239 742 can be divided by 2: 239 742 / 2 = 119 871.
For 239 742 to be a prime number, it would have been required that 239 742 has only two divisors, i.e., itself and 1.
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239 742 is an even number, because it is evenly divisible by 2: 239 742 / 2 = 119 871.
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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 239 742 is about 489.635.
Thus, the square root of 239 742 is not an integer, and therefore 239 742 is not a square number.
The square of a number (here 239 742) is the result of the product of this number (239 742) by itself (i.e., 239 742 × 239 742); the square of 239 742 is sometimes called "raising 239 742 to the power 2", or "239 742 squared".
The square of 239 742 is 57 476 226 564 because 239 742 × 239 742 = 239 7422 = 57 476 226 564.
As a consequence, 239 742 is the square root of 57 476 226 564.
The multiples of 239 742 are all integers evenly divisible by 239 742, that is all numbers such that the remainder of the division by 239 742 is zero. There are infinitely many multiples of 239 742. The smallest multiples of 239 742 are: