The Number
642
Six Hundred and Forty-Two
In Base 19 Nonadecimal Is
1ef19
The numbers with a 19 subscript use Base 19 Nonadecimal notation.
For more familiar numbers: See Six Hundred and Forty-Two 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.
6.42e2
Reciprocal
A number multiplied with its reciprocal is one.
0.00acig3b0e11f5f19
The reciprocal of 642 in Base 19 Nonadecimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 1ef19 is not a palindrome.
Not A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Six hundred and forty-two is a composite number with 8 total factors (including 1 and itself). See primes in Base 19 Nonadecimal
A Composite
Composites have more than just these two factors.
Six hundred and forty-two is a composite number with 8 total factors (including 1 and itself).
Prime Factors
The number six hundred and forty-two has the following 3 prime factors:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
2191
·
3191
·
5c191
= 1ef19
Base Conversions
The number six hundred and forty-two in 35 different bases