It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 145 502 is not a prime number.
For example, 145 502 can be divided by 2: 145 502 / 2 = 72 751.
For 145 502 to be a prime number, it would have been required that 145 502 has only two divisors, i.e., itself and 1.
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145 502 is an even number, because it is evenly divisible by 2: 145 502 / 2 = 72 751.
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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 145 502 is about 381.447.
Thus, the square root of 145 502 is not an integer, and therefore 145 502 is not a square number.
The square of a number (here 145 502) is the result of the product of this number (145 502) by itself (i.e., 145 502 × 145 502); the square of 145 502 is sometimes called "raising 145 502 to the power 2", or "145 502 squared".
The square of 145 502 is 21 170 832 004 because 145 502 × 145 502 = 145 5022 = 21 170 832 004.
As a consequence, 145 502 is the square root of 21 170 832 004.
The multiples of 145 502 are all integers evenly divisible by 145 502, that is all numbers such that the remainder of the division by 145 502 is zero. There are infinitely many multiples of 145 502. The smallest multiples of 145 502 are: