12981 (number)

12981 is an odd 5-digits composite number following 12980 and preceding 12982. In scientific notation, it is written as 1.2981 × 10^4. The sum of its digits is 21. It has a total of 2 prime factors and 4 positive divisors. There are 8652 positive integers (up to 12981) that are relatively prime to 12981.

Interesting facts

Basic properties

Name

Name twelve thousand nine hundred eighty-one

Notation

Scientific notation 1.2981 × 10^4
Engineering notation 1.2981 × 10^3

Prime Factorization of 12981

Prime Factorization 3 × 4327

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 12981
Product of the distinct prime numbers

The prime factorization of 12981 is 3 × 4327. Since it has a total of 2 prime factors.

Most popular turbo-numbers

2, 4, 91, 37, 2, 547, 9983, 3570, 27838, 49338, 230413, 563432, 4589760, 7165330, 95084996, 94783838, 966570670, 522782091, 2586829194, 3414318696

Basic calculations (n = 12981)

Multiplication

n×y
n×2 25962
n×3 38943
n×4 51924
n×5 64905

Division

n÷y
n÷2 6490.5
n÷3 4327
n÷3 3245.25
n÷5 2596.2

Exponentiation

ny
n2 168506361
n3 2187381072141
n4 28394393697462321
n5 3.6858762458676E+20

Nth Root

y√n
2√n 113.93419153178
3√n 23.50188607165
4√n 10.673996043272
5√n 6.6475502662156

Divisors of 12981

1, 3, 4327, 12981

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -12980
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 12981 can be divided by 4 positive divisors. The sum of these divisors (counting 12981) is 1, the average is 0.25.

Base conversion 12981

Base System Value
2 Binary 11001010110101
3 Ternary 122210210
4 Quaternary 3022311
5 Quinary 403411
6 Senary 140033
8 Octal 31265
10 Decimal 12981
12 Duodecimal 7619
16 Hexadecimal 32b5
20 Vigesimal 1c91
36 Base36 a0l

Cryptographic Hash Functions

md5 aaf662be6cd123f4c54c4d90d24b1373
sha1 b63be433fe21febe68a002c781687094722ac871
sha256 6e1dfd1dd07b18692220cd26f70cac85a02241bb87d55a864ea7a116c77a25f0
sha512 9305e32eacdb306326ace37d8160e17054d0c4f49f6ab9dfe87a14619698319abd0c28186c916e5c43655e11574c81e005a63659449a9b4f39a11ed600c9f37c
ripemd-160 6c641440a4012ee541280ba6138ca90afef33ad7

12981 as geometric shapes

Circle

Radius = n
Diameter 25962
Circumference 81562.028472498
Area 529378345.80075

Sphere

Radius = n
Volume 9162480409119.4
Surface area 2117513383.203
Circumference 81562.028472498

Square

Length = n
Perimeter 51924
Area 168506361
Diagonal 18357.906253165

Cube

Length = n
Surface area 1011038166
Volume 2187381072141
Space diagonal 22483.751533052

Equilateral Triangle

Length = n
Perimeter 38943
Area 72965394.662636
Altitude 11241.875766526

Triangular Pyramid

Length = n
Surface area 72965394.662636
Volume 257785331525
Height 6119.3020843884