574

574 = 2 x 7 x 41.

574 is the maximum number of pieces into which a torus can be cut by 14 slices.

574 is 210021 in base 3. It is 707 in base 9.

574 is the number of sevens among the digits of all four-digit primes (A152279).

574² = 329476 contains exactly six different digits (A054034).

Source: What's Special About This Number?