It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 438 is not a prime number.
For example, 120 438 can be divided by 2: 120 438 / 2 = 60 219.
For 120 438 to be a prime number, it would have been required that 120 438 has only two divisors, i.e., itself and 1.
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120 438 is an even number, because it is evenly divisible by 2: 120 438 / 2 = 60 219.
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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 120 438 is about 347.042.
Thus, the square root of 120 438 is not an integer, and therefore 120 438 is not a square number.
The square of a number (here 120 438) is the result of the product of this number (120 438) by itself (i.e., 120 438 × 120 438); the square of 120 438 is sometimes called "raising 120 438 to the power 2", or "120 438 squared".
The square of 120 438 is 14 505 311 844 because 120 438 × 120 438 = 120 4382 = 14 505 311 844.
As a consequence, 120 438 is the square root of 14 505 311 844.
The multiples of 120 438 are all integers evenly divisible by 120 438, that is all numbers such that the remainder of the division by 120 438 is zero. There are infinitely many multiples of 120 438. The smallest multiples of 120 438 are: