This number is a prime.

+ A 401(k) is a type of tax deferred retirement plan that allows employees to save and invest for their own retirement.

+ The Magnolia Bakery is located at 401 Bleecker Street in the West Village neighborhood of Manhattan, New York City. The exterior of the bakery is featured in the movie Prime.

+ 401 was the hull number of the RMS Titanic. [Gronos]

+ Cigarette smoke contains 401 poisons. [Beedassy]

+ The years of the 57672nd century have a total of 401 prime factors making it the first for which the average year has more than four. [Gaydos]

+ The only 3-digit prime formed by using the squares of first three digits. [Loungrides]

+ Harry Houdini died in Room 401 at Detroit's Grace Hospital. [Wyett]

+ The smallest prime that can be represented as the sum of products of first n pairs of consecutive positive even numbers plus 1, i.e., 2*4+6*8+10*12+14*16+1, (case n=4). [Loungrides]

+ 401 is the 79th prime number. The exact value for the speed of light is 299792458 m/s, and beginning from position 299792458 in the decimal digits of π is the string 40179. [Slattery]

+ USS Maury (DD-401) was a Gridley-class destroyer in the United States Navy. She was named for "Pathfinder of the Seas" Matthew Fontaine Maury (1806–1873) who was an American astronomer, naval officer, historian, oceanographer, meteorologist, cartographer, author, geologist, and educator.

+ The smallest of only two 3-digit tetranacci primes. The other is 773. [Loungrides]

+ 401 is the Hebrew gematria for the word et, the untranslatable word. It’s made up of 2 Hebrew letters: Aleph and Tav which are the first and last letters of the Hebrew alphabet. [Reynolds]

(There are 2 curios for this number that have not yet been approved by an editor.)

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