It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 148 138 is not a prime number.
For example, 148 138 can be divided by 2: 148 138 / 2 = 74 069.
For 148 138 to be a prime number, it would have been required that 148 138 has only two divisors, i.e., itself and 1.
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148 138 is an even number, because it is evenly divisible by 2: 148 138 / 2 = 74 069.
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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 148 138 is about 384.887.
Thus, the square root of 148 138 is not an integer, and therefore 148 138 is not a square number.
The square of a number (here 148 138) is the result of the product of this number (148 138) by itself (i.e., 148 138 × 148 138); the square of 148 138 is sometimes called "raising 148 138 to the power 2", or "148 138 squared".
The square of 148 138 is 21 944 867 044 because 148 138 × 148 138 = 148 1382 = 21 944 867 044.
As a consequence, 148 138 is the square root of 21 944 867 044.
The multiples of 148 138 are all integers evenly divisible by 148 138, that is all numbers such that the remainder of the division by 148 138 is zero. There are infinitely many multiples of 148 138. The smallest multiples of 148 138 are: