It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 138 046 is not a prime number.
For example, 138 046 can be divided by 2: 138 046 / 2 = 69 023.
For 138 046 to be a prime number, it would have been required that 138 046 has only two divisors, i.e., itself and 1.
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138 046 is an even number, because it is evenly divisible by 2: 138 046 / 2 = 69 023.
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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 138 046 is about 371.545.
Thus, the square root of 138 046 is not an integer, and therefore 138 046 is not a square number.
The square of a number (here 138 046) is the result of the product of this number (138 046) by itself (i.e., 138 046 × 138 046); the square of 138 046 is sometimes called "raising 138 046 to the power 2", or "138 046 squared".
The square of 138 046 is 19 056 698 116 because 138 046 × 138 046 = 138 0462 = 19 056 698 116.
As a consequence, 138 046 is the square root of 19 056 698 116.
The multiples of 138 046 are all integers evenly divisible by 138 046, that is all numbers such that the remainder of the division by 138 046 is zero. There are infinitely many multiples of 138 046. The smallest multiples of 138 046 are: