71 (number)

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← 70 71 72 →
Cardinalseventy-one
Ordinal71st
(seventy-first)
Factorizationprime
Prime20th
Divisors1, 71
Greek numeralΟΑ´
Roman numeralLXXI
Binary10001112
Ternary21223
Quaternary10134
Quinary2415
Senary1556
Octal1078
Duodecimal5B12
Hexadecimal4716
Vigesimal3B20
Base 361Z36

71 (seventy-one) is the natural number following 70 and preceding 72.

In mathematics[edit]

71 is:

If we add up the primes less than 71 (2 through 67), we get 568, which is divisible by 71, 8 times.

In science[edit]

In astronomy[edit]

In other fields[edit]

Seventy-one is also:

References[edit]

  1. ^ "Sloane's A069099 : Centered heptagonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  2. ^ "Sloane's A063980 : Pillai primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  3. ^ "Sloane's A002267 : The 15 supersingular primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  4. ^ "Sloane's A000945 : Euclid-Mullin sequence". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  5. ^ "Tables of imaginary quadratic fields with small class number". numbertheory.org.