In honor of my 41st birthday, here are 41 fun facts about the number 41:

- 41 is the natural number following 40 and preceding 42.
- 41 is an odd number.
- 41 is a prime number.
- 41 is a twin prime with the number 43.
- 41 is the sum of the first six prime numbers (2 + 3 + 5 + 7 + 11 + 13).
- 41 is a supersingular prime.
- 41 is a Sophie Germain prime.
- 41 is a Newman-Shanks-Williams prime.
- 41 is an Eisenstein prime.
- 41 is a Proth prime.
- 41 is the largest of Euler’s lucky numbers.
- 41 is the sum of two squares (16 + 25).
- 41 is a centered square number.
- 41 is the first number in a Cunningham chain consisting of 41, 83, and 167.
- Adding up the sums for the divisors of the numbers 1 through 7 yields 41.
- Symphony No. 41 is the last symphony of Wolfgang Amadeus Mozart.
- “#41” is a song by the Dave Matthews Band.
- Roman emperor Caligula was assassinated in the year 41.
- 41 was Charlton Heston’s designation as a warship slave in the film
*Ben-Hur*. - 41 is the code number given to Tetsuo Shima in the film
*Akira*. - 41 is Billy Cole’s jersey number in the film
*The Last Boy Scout*. - Cary Grant is attacked by a crop duster on Highway 41 in the film
*North by Northwest*. - 41 is the atomic number for niobium.
- The Messier object M41 is magnitude 5.0 open cluster in the constellation Canis Major.
- The New General Catalogue object NGC 41 is a spiral galaxy in the constellation Pegasus.
- A 41-gun salute is used on special occasions in the United Kingdom.
- One molecule of Penicillin G had 41 atoms.
- The Roman numeral for 41 is XLI.
- George H. W. Bush was the 41st president.
- “The 41 for Freedom” was the nickname of the United States ballistic missile submarine fleet.
- Some 10mm caliber firearm cartridges are referred to as “.41.”
- C-41 process is the film developing process for 35mm color negative film.
- 41 is the number of the French department Loire-et-Cher.
- 41 is the number of members in the U.S. Senate needed to defeat a cloture vote and sustain a filibuster indefinitely.
- Pope Zosimus was the 41st pope.
- Montana was the 41st state to be admitted to the Union.
- 41 is the calling code assigned to Switzerland.
- 41 is the retired jersey number of Chicago Bears running back Brian Piccolo.
- 41 was the race number worn by Sir Roger Bannister when he broke the 4-minute mile barrier.
- 41 is the car number currently driven by NASCAR driver Kurt Busch.
- 41 in binary is 101001.