It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 142 249 is not a prime number.
For example, 142 249 can be divided by 59: 142 249 / 59 = 2 411.
For 142 249 to be a prime number, it would have been required that 142 249 has only two divisors, i.e., itself and 1.
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142 249 is an odd number, because it is not evenly divisible by 2.
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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 142 249 is about 377.159.
Thus, the square root of 142 249 is not an integer, and therefore 142 249 is not a square number.
The square of a number (here 142 249) is the result of the product of this number (142 249) by itself (i.e., 142 249 × 142 249); the square of 142 249 is sometimes called "raising 142 249 to the power 2", or "142 249 squared".
The square of 142 249 is 20 234 778 001 because 142 249 × 142 249 = 142 2492 = 20 234 778 001.
As a consequence, 142 249 is the square root of 20 234 778 001.
The multiples of 142 249 are all integers evenly divisible by 142 249, that is all numbers such that the remainder of the division by 142 249 is zero. There are infinitely many multiples of 142 249. The smallest multiples of 142 249 are: