It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 142 988 is not a prime number.
For example, 142 988 can be divided by 2: 142 988 / 2 = 71 494.
For 142 988 to be a prime number, it would have been required that 142 988 has only two divisors, i.e., itself and 1.
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142 988 is an even number, because it is evenly divisible by 2: 142 988 / 2 = 71 494.
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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 142 988 is about 378.138.
Thus, the square root of 142 988 is not an integer, and therefore 142 988 is not a square number.
The square of a number (here 142 988) is the result of the product of this number (142 988) by itself (i.e., 142 988 × 142 988); the square of 142 988 is sometimes called "raising 142 988 to the power 2", or "142 988 squared".
The square of 142 988 is 20 445 568 144 because 142 988 × 142 988 = 142 9882 = 20 445 568 144.
As a consequence, 142 988 is the square root of 20 445 568 144.
The multiples of 142 988 are all integers evenly divisible by 142 988, that is all numbers such that the remainder of the division by 142 988 is zero. There are infinitely many multiples of 142 988. The smallest multiples of 142 988 are: