It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 122 738 is not a prime number.
For example, 122 738 can be divided by 2: 122 738 / 2 = 61 369.
For 122 738 to be a prime number, it would have been required that 122 738 has only two divisors, i.e., itself and 1.
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122 738 is an even number, because it is evenly divisible by 2: 122 738 / 2 = 61 369.
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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 122 738 is about 350.340.
Thus, the square root of 122 738 is not an integer, and therefore 122 738 is not a square number.
The square of a number (here 122 738) is the result of the product of this number (122 738) by itself (i.e., 122 738 × 122 738); the square of 122 738 is sometimes called "raising 122 738 to the power 2", or "122 738 squared".
The square of 122 738 is 15 064 616 644 because 122 738 × 122 738 = 122 7382 = 15 064 616 644.
As a consequence, 122 738 is the square root of 15 064 616 644.
The multiples of 122 738 are all integers evenly divisible by 122 738, that is all numbers such that the remainder of the division by 122 738 is zero. There are infinitely many multiples of 122 738. The smallest multiples of 122 738 are: