The Number
4001
Four Thousand and One
In Base 21 Unovigesimal Is
91b21
The numbers with a 21 subscript use Base 21 Unovigesimal notation.
For more familiar numbers: See Four Thousand and One in Base 10 Decimal
Nearby Numbers
Positive, nonzero integers within three units
Scientific Notation
Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.
4.001e3
Reciprocal
A number multiplied with its reciprocal is one.
0.0026cg3cabba5h21
The reciprocal of 4001 in Base 21 Unovigesimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 91b21 is not a palindrome.
A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Four thousand and one is the 551st prime number. See primes in Base 21 Unovigesimal
Not A Composite
Composites have more than just these two factors.
Four Thousand and One is not a composite number because it has exactly two factors: One and Four Thousand and One
Prime Factors
The number four thousand and one has the following 1 prime factor:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
91b211
= 91b21
Base Conversions
The number four thousand and one in 35 different bases