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1006

1006 is the natural number that follows 1005 and precedes 1007. It is an even composite number with prime factorization 2 × 503. Its divisors are 1, 2, 503 and 1006, giving it four positive divisors in total. The sum of its divisors is 1512. In Roman numerals it is written as MVI; in binary it is 1111101110; and in hexadecimal it is 0x3EE.

As a year, AD 1006 is a milestone in the early medieval period and is especially noted

Beyond calendar use, 1006 appears in various numbering schemes and catalogs as a simple four-digit designation.

for
SN
1006,
a
bright
supernova
observed
in
China,
Japan,
the
Middle
East
and
Europe.
It
is
generally
regarded
as
one
of
the
brightest
supernovae
in
recorded
history.
Modern
study
of
the
remnant
has
contributed
to
understanding
of
supernova
mechanisms
and
the
interaction
of
exploded
material
with
the
interstellar
medium.
In
mathematical
and
educational
contexts
it
is
used
as
an
example
of
an
even,
composite
number
and
as
a
test
case
in
arithmetic
and
algorithm
demonstrations.