It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 145 988 is not a prime number.
For example, 145 988 can be divided by 2: 145 988 / 2 = 72 994.
For 145 988 to be a prime number, it would have been required that 145 988 has only two divisors, i.e., itself and 1.
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145 988 is an even number, because it is evenly divisible by 2: 145 988 / 2 = 72 994.
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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 145 988 is about 382.084.
Thus, the square root of 145 988 is not an integer, and therefore 145 988 is not a square number.
The square of a number (here 145 988) is the result of the product of this number (145 988) by itself (i.e., 145 988 × 145 988); the square of 145 988 is sometimes called "raising 145 988 to the power 2", or "145 988 squared".
The square of 145 988 is 21 312 496 144 because 145 988 × 145 988 = 145 9882 = 21 312 496 144.
As a consequence, 145 988 is the square root of 21 312 496 144.
The multiples of 145 988 are all integers evenly divisible by 145 988, that is all numbers such that the remainder of the division by 145 988 is zero. There are infinitely many multiples of 145 988. The smallest multiples of 145 988 are: