1126

1126 = 2 x 563.

1126 is the number of 3 x 4 checkerboards in which the set of red squares is edge-connected.

1126 is the sum of the first 15 Sophie Germain primes.

1126³ (1427628376) includes the digits of 1126² (1267876).

In the year 1126, Adelard of Bath translated Muhammad ibn-Musa al-Kwarizmi's arithmetic and astronomical tables into Latin.

Source: On-Line Encyclopedia of Integer Sequences