1875 is the smallest order for which there are 21 groups.
The product of the prime factors of 1875 plus one is a perfect square: 3 x 5 + 1 = 16 = 42.
1875 is a number n such that n - 4, n - 2, n + 2, and n + 4 are prime: 1871, 1873, 1877, and 1879 are all prime.
French mathematician Henri Lebesgue was born June 28, 1875.
French mathematician Henri Lebesgue was born June 28, 1875.
