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# Is 61 a prime number?

Sixty-one is a prime number. It is the 18th prime number in the series. It is also a centered square number, a centered hexagonal number and a centered decagonal number and the sum of two square numbers.

Continue ReadingPrime numbers are whole numbers larger than 1 that can't be divided by any number other than 1 and itself and still result in a whole number. Prime numbers are always odd, because any even number greater than 2 can be divided by 1, 2 and itself. Similarly, any number ending in 5 can't be prime, because it can be divided by 1, 5 and itself.

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Q:
## Is three a prime number?

A: The number 3 is a prime number. A prime number is a positive number that can only be divided evenly by the number 1 and itself. Full Answer >Filed Under: -
Q:
## What does the term value refer to in mathematics?

A: In math, the word "value" refers to a number. This number is often the result of a previous calculation, but it can also refer to the value of a variable o... Full Answer >Filed Under: -
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## What is the largest number in the world?

A: The largest named number in the world is a googolplexian. Because numbers are infinite, and any number can be made larger by simply adding to it, the large... Full Answer >Filed Under: -
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## What is the definition of "scientific notation"?

A: The scientific notation of a number is the product of the digit term and exponential term. The digits denote the significant figures of the number, which i... Full Answer >Filed Under: