The Number
12821
Twelve Thousand Eight Hundred and Twenty-One
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.
1.2821e4
Reciprocal
A number multiplied with its reciprocal is one.
0.00007799703611262772
The reciprocal of 12821.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 12821 is a palindrome.
A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Twelve thousand eight hundred and twenty-one is the 1528th prime number. See primes in Base 10 Decimal
Not A Composite
Composites have more than just these two factors.
Twelve Thousand Eight Hundred and Twenty-One is not a composite number because it has exactly two factors: One and Twelve Thousand Eight Hundred and Twenty-One
Prime Factors
The number twelve thousand eight hundred and twenty-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
128211
= 12821
Base Conversions
The number twelve thousand eight hundred and twenty-one in 35 different bases