1355

1355 is a natural number that follows 1354 and precedes 1356. In historical terms, AD 1355 was a year in the mid-14th century during the late medieval period. It occurred during the ongoing conflicts of the Hundred Years’ War and amid the continuing social and economic effects of the Black Death, which had reshaped European society in the preceding years.

Mathematically, 1355 is an odd composite number. It factors as 5 × 271, with 271 prime, making 1355 a semiprime. Its digits sum to 14, giving a digital root of 5. In common bases, 1355 equals 10101001011 in binary, 0x54B in hexadecimal, and 2513 in octal. It is not a square or a cube, and it is not prime.

In Roman numerals, 1355 is written as MCCCLV, representing 1000 (M) plus 300 (CCC) plus 50 (L) plus 5 (V).

Overall, 1355 serves as an example of a mid-range four-digit number with simple factorization and straightforward representations across several numeral systems, as well as a reference point in the historical context of the 14th century.