# Is 145 a Prime Number?

Is 145 a prime number? * "No, 145 is not a prime number."* A number can be classified as prime or composite depending on the factors it contains; it could either have only 2 factors or more than 2 factors. Numbers like 383 with only 2 factors, i.e. 1 and 383 are called prime numbers. However, numbers like 651 with more than 2 factors are called composite numbers. Let us find out how and why is 145 a prime number or a composite number?

**Is 145 a prime number? -**No**Is 145 a composite number? -**Yes**Prime Factors of 145 -**5, 29**Factors of 145 -**1, 5, 29, 145**Is 145 a perfect square? -**No

## Is 145 a Prime Number?

No, 145 is not a prime number. The number 145 is divisible by 1, 5, 29, 145. For a number to be classified as a prime number, it should have exactly two factors. Since 145 has more than two factors, i.e. 1, 5, 29, 145, it is not a prime number.

## Why is 145 not a Prime Number?

To understand whether 145 is composite or prime, it is important to find its factors.

**Factors of 145:** 1, 5, 29, 145

Since 145 has more than 2 factors, we can say that 145 is not a prime number.

## Is 145 a Composite Number?

Yes, since 145 has more than two factors i.e. 1, 5, 29, 145. In other words, 145 is a composite number because 145 has more than 2 factors.

**Problem Statements: **

Is 145 a Prime Number? | No |

Is 145 a Composite Number? | Yes |

Multiples of 145 | 145, 290, 435, 580, 725, 870, 1015, 1160, 1305, 1450 |

Square of 145 | 21025 |

Is 145 a Perfect Cube? | No |

Square Root of 145 | 12.041595 |

Cube Root of 145 | 5.253579 |

Is 145 an Even Number? | No |

Is 145 a Perfect Square? | No |

Is 145 an Odd Number? | Yes |

**Fun Facts: **

- Prime numbers greater than 5 can be represented in the form of either 6n + 1 or 6n - 1. Example - 71 is a prime number and it can be written as 71 = 6 × 12 - 1
- A perfect square (square number) is always a composite number.
- 1 is neither prime nor composite.

**☛ Also Check: **

- Is 15 a Prime Number? - No
- Is 10 a Prime Number? - No
- Is 21 a Prime Number? - No
- Is 9 a Prime Number? - No
- Is 221 a Prime Number? - No
- Is 713 a Prime Number? - No
- Is 2019 a Prime Number? - No
- Is 523 a Prime Number? - Yes