Is 14 a prime number?
14 is not a prime number. Here is the quickest way to see it.
The answer
No. 14 is not a prime number: 2 × 7 = 14.
How to see that 14 is not prime
14 is even, and every even number can be divided by 2, so 2 is a factor as well as 1 and 14.
14 has four factors: 1 and 14, plus one pair in between, 2 and 7.
Split 14 into prime factors
14 splits straight into two primes, 2 × 7, so its factor tree has only one branch.
14 in the times tables
14 turns up in 2 different times tables, the 2 and 7: 2 × 7 and 7 × 2.
Quick checks that catch 14
- The last digit, 4, is even, so 2 goes in.
14 at a glance
- In words
- fourteen
- In Roman numerals
- XIV
- Odd or even
- Even: it ends in 4
- Its factors add up to
- 24, or 10 without 14 itself, which makes 14 a deficient number
The numbers either side of 14
- 13 is prime: 2 and 3 do not go into it, and 5 × 5 is already past 13. Check 13 in full
- 15 is not prime. Its digits add up to 1 + 5 = 6, which is a multiple of 3. That means 15 is a multiple of 3 too, so 3 is a factor. Check 15 in full
Turn the digits round
14 backwards is 41. 41 is prime: 2, 3 and 5 do not go into it, and 7 × 7 is already past 41. Check 41 in full
Related pages
More numbers
Questions parents ask
Which prime numbers are either side of 14?
13 below it and 17 above it, a gap of 4.
What is 14 squared?
14 × 14 = 196.
What is the smallest number with as many factors as 14?
6. It has 4 factors, the same as 14.
Number facts are the base of 11+ maths
Factors, multiples, primes and square numbers come up all over 11+ maths, from simplifying fractions to ratio. The free diagnostic checks maths, English and both kinds of reasoning, and shows what to practise next. No card is required.