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161 (number)
Natural number From Wikipedia, the free encyclopedia
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161 (one hundred [and] sixty-one) is the natural number following 160 and preceding 162.
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In mathematics
- 161 is the sum of five consecutive prime numbers: 23, 29, 31, 37, and 41.
- 161 is a hexagonal pyramidal number.[1]
- 161 is a semiprime. Since its prime factors 7 and 23 are both Gaussian primes, 161 is a Blum integer.
- 161 is a palindromic number.[2]
- 161/72 is a commonly used rational approximation of the square root of 5 and is the closest fraction with denominator <300 to that number.
In other fields
- 161 as a code for Anti-Fascist Action (A=1, F=6, by order of the alphabet), sometimes used in 161>88[3] (88 being code for Heil Hitler among neo-nazis, as H=8)
External links
Wikimedia Commons has media related to 161 (number).
- Number Facts and Trivia: 161
- The Number 161
- VirtueScience: 161 Archived 2021-01-24 at the Wayback Machine
References
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