It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 142 042 is not a prime number.
For example, 142 042 can be divided by 2: 142 042 / 2 = 71 021.
For 142 042 to be a prime number, it would have been required that 142 042 has only two divisors, i.e., itself and 1.
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142 042 is an even number, because it is evenly divisible by 2: 142 042 / 2 = 71 021.
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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 142 042 is about 376.885.
Thus, the square root of 142 042 is not an integer, and therefore 142 042 is not a square number.
The square of a number (here 142 042) is the result of the product of this number (142 042) by itself (i.e., 142 042 × 142 042); the square of 142 042 is sometimes called "raising 142 042 to the power 2", or "142 042 squared".
The square of 142 042 is 20 175 929 764 because 142 042 × 142 042 = 142 0422 = 20 175 929 764.
As a consequence, 142 042 is the square root of 20 175 929 764.
The multiples of 142 042 are all integers evenly divisible by 142 042, that is all numbers such that the remainder of the division by 142 042 is zero. There are infinitely many multiples of 142 042. The smallest multiples of 142 042 are: