Numbers 1250-1279

A page of the Numeropedia - the Special Encyclopedia of Numbers

1000-1099    1100-1199    1200-1299   1300-1399   1400-1499 

 1500-1599   1600-1699   1700-1799    1800-1899   1900-1999

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1,252

[History]  The Flioria gold coins were created in Florence, became the first international currency.

 

1,259

[Math.]  A sequence of consecutive reversible prime numbers:  1193, 1201, 1213, 1217, 1223, 1229, 1231, 1237, 1249 and 1259.

 

[Math.]  The largest number (also prime number) that can be displayed on a digital clock in the 12-hour format (excluding seconds and the colon “:”) is 12:59.

 

1,260

[Math.]  Sum (in degrees) of all internal angles of a 9-side polygon.

 

1,267

[Math.]  12673 = 2,033,901,163 = (20–3–3+90+1163)3.

 

1,271

[History]  The year Marco Polo began to leave Venice for travels to Asia. He lived prosperously for 17 years and returned home and died in 1323.

 

1,275

[Math.]  A triangular number (sum of all integers from 1 to 50):  1275 = 1+2+…+49+50.

 

1,276

[Math.]  1,276 = 1111+22+77+66.

 

1,277

[Math.]  A prime number.

 

1,278

[Math.]  1,278 = 1111+2+77+88.

 

1,279

[Math.]  A prime number. A Mersenne exponent: 21279–1 is the 15th Mersenne prime number.

 

1,210-1229 (separate page)

              

1,230-1249 (separate page)

 

1,250-1279 (separate page)

                

1,280-1299 (separate page)