It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 124 238 is not a prime number.
For example, 124 238 can be divided by 2: 124 238 / 2 = 62 119.
For 124 238 to be a prime number, it would have been required that 124 238 has only two divisors, i.e., itself and 1.
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124 238 is an even number, because it is evenly divisible by 2: 124 238 / 2 = 62 119.
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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 124 238 is about 352.474.
Thus, the square root of 124 238 is not an integer, and therefore 124 238 is not a square number.
The square of a number (here 124 238) is the result of the product of this number (124 238) by itself (i.e., 124 238 × 124 238); the square of 124 238 is sometimes called "raising 124 238 to the power 2", or "124 238 squared".
The square of 124 238 is 15 435 080 644 because 124 238 × 124 238 = 124 2382 = 15 435 080 644.
As a consequence, 124 238 is the square root of 15 435 080 644.
The multiples of 124 238 are all integers evenly divisible by 124 238, that is all numbers such that the remainder of the division by 124 238 is zero. There are infinitely many multiples of 124 238. The smallest multiples of 124 238 are: