2645 is an odd 4-digits composite number following 2644
and preceding 2646 . In scientific notation, it is written as 2.645 × 10^3.
The sum of its digits is 17. It has a total of 3 prime factors and 6 positive divisors.
There are 2024 positive integers (up to 2645) that are relatively prime to 2645.
2645 has 6 divisors, whose sum is 3318
The reverse of 2645 is 5462
Previous prime number is 23
Is Prime? no
Number parity odd
Number length 4
Sum of Digits 17
Digital Root 8
Name
two thousand six hundred forty-five
Scientific notation
2.645 × 10^3
Engineering notation
2.645 × 10^3
Prime Factorization
5 × 23 × 23
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
115
Product of the distinct prime numbers
The prime factorization of 2645 is 5 × 23 × 23.
Since it has a total of 3 prime factors.
2 , 6 , 19 , 26 , 552 , 786 , 6534 , 1721 , 81761 , 71794 , 200606 , 870283 , 3515037 , 1120315 , 48928528 , 57215119 , 805515469 , 901354369 , 7238047772 , 3405781604
n×2
5290
n×3
7935
n×4
10580
n×5
13225
n÷2
1322.5
n÷3
881.66666666667
n÷3
661.25
n÷5
529
n2
6996025
n3
18504486125
n4
48944365800625
n5
129457847542653125
2 √n
51.429563482495
3 √n
13.829566239282
4 √n
7.171440823328
5 √n
4.8359871174255
6 divisors
τ
Total Divisors
6
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-2644
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.16666666666667
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
6
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 2645 can be divided by 6 positive divisors.
The sum of these divisors (counting 2645) is 1, the average is 0.16666666666667.
Base
System
Value
2
Binary
101001010101
3
Ternary
10121222
4
Quaternary
221111
5
Quinary
41040
6
Senary
20125
8
Octal
5125
10
Decimal
2645
12
Duodecimal
1645
16
Hexadecimal
a55
20
Vigesimal
6c5
36
Base36
21h
md5
a7789ef88d599b8df86bbee632b2994d
sha1
3e2feb47655ed2eb9623395ebfa3b54bdc7d2b7d
sha256
c63bd0d975c69098ee4739650068349dd2812231b5b0a17c0772093ef07bbebd
sha512
61a3cf9442941c11251ed92f777e9bc3893790117251a4a97c8968f7d3c3adf8dd43b8ee8ca9bdbe9ad21a5707711b87b95ad9901b0066ca09dce077fae68557
ripemd-160
20499d3a0aa5e91a602ad3684b9ae0c3965341bb
Diameter
5290
Circumference
16619.02513749
Area
21978660.744331
Volume
77511410225.006
Surface area
87914642.977322
Circumference
16619.02513749
Perimeter
10580
Area
6996025
Diagonal
3740.5948724768
Surface area
41976150
Volume
18504486125
Space diagonal
4581.2743860197
Perimeter
7935
Area
3029367.6877555
Altitude
2290.6371930098
Surface area
3029367.6877555
Volume
2180774603.56
Height
1246.8649574923