1700

1700 = 2 x 2 x 5 x 5 x 17.

1700 is 11010100100 in base 2 (binary).

1700 is the generalized Catalan numer C(13, 4) (A039598).

1700 is 4646 in base 7. It is 2288 in base 9 and A0A in base 13.

1700 has three representations as a sum of two squares (A000443): 1700 = 10² + 40² = 16² + 38² = 26² + 32².

Source: What's Special About This Number?

132

132 = 2² x 3 x 11.

The sum of all two-digit numbers that you can make from 132 is 132: 12 + 13 + 21 + 23 + 31 + 32 = 132. It is the smallest number with this property.

132 is the sixth Catalan number.

132 is a divisor of 23² - 1.

The game board for Indian snakes and ladders (Moksha Patamu) has 132 squares.

Source: Number Gossip

429

429 = 3 x 11 x 13.

429 is the seventh Catalan number.

429 is a divisor of 100³ - 1.

The sum of the digits of 429 is five times the number of digits: 4 + 2 + 9 = 15 = 5 x 3.

The sum of the fourth powers of the factors of 429 is a prime: 3⁴ + 11⁴ + 13⁴ = 43283.

The 429 Records label in indie rock/pop and adult alternative music, with a roster that includes Dr. John, Joan Armatrading, and Mick Fleetwood.

Source: On-Line Encyclopedia of Integer Sequences