1856

1856 = 2 x 2 x 2 x 2 x 2 x 2 x 29.

The product of the digits of 1856 is 12 times their sum (A062045).

1856 is a number n for which 12n + 1, 12n + 5, and 12n + 7 are primes (A123979).

1856 is the sum of four nonzero squares in exactly two ways (A025358).

1856 has a representation as a sum of two squares: 1856 = 16² + 40².

1856 divides 17⁴ - 1.

1856 is a year in which there were five Fridays in the month of February (A141287).

Source: OEIS