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1223

1223 is a natural number that follows 1222 and precedes 1224. In mathematics, 1223 is a prime number. It is odd and greater than 2, and none of the primes up to 31 divides it; since the square root of 1223 is about 34.97, primality can be verified by checking divisors up to 31. Therefore, 1223 has no nontrivial positive divisors.

In base representations, 1223 equals 10011000111 in binary; 2307 in octal; and 4C7 in hexadecimal. In Roman

Additional properties include its digit sum, which is 1 + 2 + 2 + 3 = 8. This means 1223

As a calendar year, 1223 CE lies in the early 13th century. In that historical frame, the

numerals,
it
is
written
as
MCCXXIII.
is
not
divisible
by
3
or
9.
As
a
prime
number
congruent
to
3
modulo
4
(1223
≡
3
mod
4),
it
cannot
be
expressed
as
the
sum
of
two
squares
of
integers.
It
is
not
a
decimal
palindrome.
year
is
used
as
a
reference
point
in
discussions
of
medieval
history,
but
specific
events
require
contextual
sources.