1245 is an odd 4-digits composite number following 1244
and preceding 1246 . In scientific notation, it is written as 1.245 × 10^3.
The sum of its digits is 12. It has a total of 3 prime factors and 8 positive divisors.
There are 656 positive integers (up to 1245) that are relatively prime to 1245.
1245 has 8 divisors, whose sum is 2016
The reverse of 1245 is 5421
Previous prime number is 3
Is Prime? no
Number parity odd
Number length 4
Sum of Digits 12
Digital Root 3
Name
one thousand two hundred forty-five
Scientific notation
1.245 × 10^3
Engineering notation
1.245 × 10^3
Prime Factorization
5 × 3 × 83
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
1245
Product of the distinct prime numbers
The prime factorization of 1245 is 5 × 3 × 83.
Since it has a total of 3 prime factors.
8 , 4 , 25 , 46 , 92 , 940 , 8933 , 2833 , 92852 , 37900 , 242706 , 436130 , 915210 , 5347654 , 22401703 , 21910089 , 116016989 , 718045106 , 4376264584 , 8771587095
n×2
2490
n×3
3735
n×4
4980
n×5
6225
n÷2
622.5
n÷3
415
n÷3
311.25
n÷5
249
n2
1550025
n3
1929781125
n4
2402577500625
n5
2991208988278125
2 √n
35.284557528755
3 √n
10.757791359025
4 √n
5.9400805995167
5 √n
4.1594304830153
8 divisors
τ
Total Divisors
8
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-1244
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.125
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
8
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 1245 can be divided by 8 positive divisors.
The sum of these divisors (counting 1245) is 1, the average is 0.125.
Base
System
Value
2
Binary
10011011101
3
Ternary
1201010
4
Quaternary
103131
5
Quinary
14440
6
Senary
5433
8
Octal
2335
10
Decimal
1245
12
Duodecimal
879
16
Hexadecimal
4dd
20
Vigesimal
325
36
Base36
yl
md5
5eac43aceba42c8757b54003a58277b5
sha1
f350d780ea8aaa48030b4db64f790c14dbcd757f
sha256
8c244b370747c1930a4e0967254778ddbb69f6a409e62beebe5f92191a09a3a1
sha512
dad0c47d949e9e8a576b80a3a90c2db5328c8848ac3213d64e95fde66cc6120f60ce7d0faf675195dc73a2905db12b5452da3f1626b28486614f5128ee7a2e09
ripemd-160
38038c5bacbf1af2829cce790ef26dbab83266f2
Diameter
2490
Circumference
7822.5657074386
Area
4869547.1528805
Volume
8083448273.7817
Surface area
19478188.611522
Circumference
7822.5657074386
Perimeter
4980
Area
1550025
Diagonal
1760.6958851545
Surface area
9300150
Volume
1929781125
Space diagonal
2156.4032554233
Perimeter
3735
Area
671180.51325049
Altitude
1078.2016277116
Surface area
671180.51325049
Volume
227426886.61555
Height
586.89862838483