Back to [Numbers 1,100-1,199]

 

1,181

[Math.]  A prime number.

 

1,184

[Math.]  The first pair of amicable numbers greater than 1000 is (1184, 1210).

 

1,185

[Math.]  1,185 = 11+1111+8+55.

 

1,187

[Math.]  A prime number.  1,187 = 111+111+888+77.

 

1,188

 [Math.]   

33×34 = 1122

33×35 = 1155

33×36 = 1188

33×37 = 1221

33×47 = 1551

33×57 = 1881

 

333×334 = 111,222

333×335 = 111,555

333×336 = 111,888

333×337 = 112,221

333×347 = 115,551

333×357 = 118,881

 … (generalizable pattern) … 

 

1,189

[Theology]  The number of chapters in the Holy Bible: 929 in Old Testament and 260 in New Testament.

 

[Math.] The 5th square number that is also a triangular number: 11892 = 1+2+…+1,681 = 1,413,721. The nth root number is 6 times the (n–1)th root minus the (n–2)th root: 1, 62, 352, 2042, 11892

 

1,189

[Tech.] The sides of an A0 sheet of paper, 1,189 mm×841 mm, whose area is 1 m2 (or exactly 999,949 mm2), the largest size in the “A” series for international standard office documents. The size “An” in the “A” series is 21/4–n/2 21/4–n/2 m. The side-to-side ratio of any paper is always approximately (1:21/2). A size in this “A” series can be made by folding the previous size in half, A0: 1,189×841 – A1: 841×594 – A2: 594×420 – A3: 420×297 A4: 297×210 – A5: 210×148 – A6: 148×105 – A7: 105×74 – A8: 74×52 – A9: 52×37 and A10: 37×26.

 

1,190

[History]  The year the Louvre Museum built in Paris, France and initially used as a fortress.

 

1,192

[Geology]  The number of islets of the island country Maldives: 1192, (none of them is bigger than 5 square miles), roughly 200 of which are inhabited, encompassed by 26 atolls.

 

1,193

[Math.]  Circular prime numbers: all 4 numbers 1193, 1931, 9311 and 3119 are prime. Its reversal 3911 is prime too.

 

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

 

1,110-1,119 (separate page)         

            

1,120-1,149 (separate page)

 

1,150-1,179 (separate page)       

              

1,180-1,199 (separate page)