# Calculate factorial of 1 (1!)

## What is the factorial of 1?

The result of **1 factorial** is shown in the field below. If you want to perform another calculation, enter a value between 0 and 500 in the field below and press calculate:

## What is the formula to calculate 1 factorial?

The calculation is performed as follows:
1! = 1

## How many zeros are there at the end of the factorial of 1?

The amount of zeros after 1! It's:
0

## What is the number of digits in 1 factorial?

The number of digits of 1! It's:
1

## Factory Table from 1 to 25

Factorial |
Result |

1! | 1 |

2! | 2 |

3! | 6 |

4! | 24 |

5! | 120 |

6! | 720 |

7! | 5040 |

8! | 40320 |

9! | 362880 |

10! | 3628800 |

11! | 39916800 |

12! | 479001600 |

13! | 6227020800 |

14! | 87178297200 |

15! | 1307674368000 |

16! | 20922789888000 |

17! | 355687428096000 |

18! | 6402373705728000 |

19! | 121645100408832000 |

20! | 2432902008176640000 |

21! | 51090942171709440000 |

22! | 1124000727777607680000 |

23! | 25852016738884976640000 |

24! | 620448401733239439360000 |

25! | 15511210043330985984000000 |

## Other factorial numbers