The Number
21390
Twenty-One Thousand Three Hundred and Ninety
In Base 8 Octal Is
516168
The numbers with a 8 subscript use Base 8 Octal notation.
For more familiar numbers: See Twenty-One Thousand Three Hundred and Ninety 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.
2.1390e4
Reciprocal
A number multiplied with its reciprocal is one.
0.00001420262360467576748
The reciprocal of 21390 in Base 8 Octal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 516168 is not a palindrome.
Not A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Twenty-one thousand three hundred and ninety is a composite number with 32 total factors (including 1 and itself). See primes in Base 8 Octal
A Composite
Composites have more than just these two factors.
Twenty-one thousand three hundred and ninety is a composite number with 32 total factors (including 1 and itself).
Prime Factors
The number twenty-one thousand three hundred and ninety has the following 5 prime factors:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
281
·
381
·
581
·
2781
·
3781
= 516168
Base Conversions
The number twenty-one thousand three hundred and ninety in 35 different bases