A: No, the number 123 is not a perfect square.

A perfect square is a number that can be expressed as the product of two equal integers.

The only way to accurately calculate if a number is a perfect square is to find the factors. Before we go through the trouble of finding the factors, there is a quick trick you can use to help determine if you need even need to do the extra work.

Try these steps first:

- A number that is a perfect square never ends in 2, 3, 7 or 8. If your number ends in any of those numbers, you can stop here because your number is not a perfect square.
- Obtain the digital root of the number. The digital root essentially is the sum of all of the digits. If you're lost, don't worry, we'll go over each step in more detail below.
- All possible numbers that are a perfect square have a digital root of 1, 4, 7, 9.

Let's try it...

**Step 1:**

What is the last number of 123? It is this number: 123. The answer is 3. Is 3 in the list of numbers that are never perfect squares (2, 3, 7 or 8)?

Answer: YES, 3 is in the list of numbers that are never perfect squares. The number 123 is NOT a perfect square and we can stop here as there is not need to complete the rest of the steps.

General Questions

- How is the number 123 written in scientific notation?
- What is the absolute value of the number 123?
- What is the negative version of the number 123?
- What is the place value chart for the number 123?
- What is the digital root of the number 123?
- How many digits is in the number 123?
- How is 123 written in roman numerals?

Factoring Questions

- What are the factors or divisors of the number 123?
- What are the prime factors of the number 123?
- What is the total number of factors of the number 123?
- What is the total number of prime factors of the number 123?
- What is the sum of all factors of the number 123 including 123?
- What is the sum of all factors of the number 123 excluding 123?
- What are the factor combinations of the number 123?
- What is the prime factorization of the number 123?

Calculation Questions

Miscellaneous Questions

- How much data will 123 bytes hold in different storage units?
- What is 123 in other base number systems?
- How is 123 spelled out in other languages or countries?
- How is 123 formatted in other languages or countries?
- How is 123 formatted as currency in different languages or countries?
- What are the different hash algorithm outputs for 123?