The Number

81642

Eighty-One Thousand Six Hundred and Forty-Two

In Base 21 Unovigesimal Is

8h2f21

The numbers with a 21 subscript use Base 21 Unovigesimal notation.

For more familiar numbers: See Eighty-One Thousand Six Hundred and Forty-Two in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

81639
8h2c21
Eighty-One Thousand Six Hundred and Thirty-Nine in Base 21 Unovigesimal
81640
8h2d21
Eighty-One Thousand Six Hundred and Forty in Base 21 Unovigesimal
81641
8h2e21
Eighty-One Thousand Six Hundred and Forty-One in Base 21 Unovigesimal
81643
8h2g21
Eighty-One Thousand Six Hundred and Forty-Three in Base 21 Unovigesimal
81644
8h2h21
Eighty-One Thousand Six Hundred and Forty-Four in Base 21 Unovigesimal
81645
8h2i21
Eighty-One Thousand Six Hundred and Forty-Five in Base 21 Unovigesimal

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

8.1642e4

Reciprocal

A number multiplied with its reciprocal is one.

0.000280agkd0j2ihi21

The reciprocal of 81642 in Base 21 Unovigesimal.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 8h2f21 is not a palindrome.

Not A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Eighty-one thousand six hundred and forty-two is a composite number with 16 total factors (including 1 and itself).   See primes in Base 21 Unovigesimal

A Composite

Composites have more than just these two factors.

Eighty-one thousand six hundred and forty-two is a composite number with 16 total factors (including 1 and itself).

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number eighty-one thousand six hundred and forty-two has the following 4 prime factors:

2
221
Two in Base 21 Unovigesimal
3
321
Three in Base 21 Unovigesimal
11
b21
Eleven in Base 21 Unovigesimal
1237
2gj21
One Thousand Two Hundred and Thirty-Seven in Base 21 Unovigesimal

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

2211 · 3211 · b211 · 2gj211 = 8h2f21

Base Conversions

The number eighty-one thousand six hundred and forty-two in 35 different bases