274

274 = 2 x 137.

274 has a representation as a sum of two squares: 274 = 7² + 15².

274 is a centered triangular number.

274 is the maximum number of regions into which 17 circles divide the plane.

(274 - 2)² + (274 - 7)⁷ + (274 - 4)⁴ is a prime.

The 274th Lucas number plus 274 is a prime.

274 is the sum of five positive cubes: 274 = 3(2³) + 2(5³).

Source: Prime Curios!