Number 14

Fourteen (14)            

  

1.      It can be portioned into 135 ways.

2.     
It is the sum of square of first three natural numbers; therefore it is called the square pyramidal number.                                                                                                                            

  14 = 1² + 2² + 3²   

3.      It is the 7^th composite number.

4.      It is the product of two primes 2 and 7.

5.      It is a Catalan number. It is the only semi primes among all Catalan number. Catalan numbers are generated by the formula-   

C_n = 2n/ n! (n+1)!                                                                                              

6.      A figure having 14 faces with triangles and square is called Cuboctahedron. It has 6 squares and 8 equilateral triangles.

                                                                   

7.      It is the smallest even number n such that φ(m) = n has no solution. The sequence of such numbers goes to 14, 26, 34, 38, 50, 62, 68, 74 and so on.

8.      It is the atomic number of Silicon. The maximum number of electron that can fit in f sub level is 14.

9.      A fortnight has 14 days.

Rajesh Kumar Thakur

rkthakur1974@gmail.com