245 (number)

245 is an odd 3-digits composite number following 244 and preceding 246. In scientific notation, it is written as 2.45 × 10^2. The sum of its digits is 11. It has a total of 3 prime factors and 6 positive divisors. There are 168 positive integers (up to 245) that are relatively prime to 245.

Interesting facts

Basic properties

Name

Name two hundred forty-five

Notation

Scientific notation 2.45 × 10^2
Engineering notation 2.45 × 10^0

Prime Factorization of 245

Prime Factorization 7 × 5 × 7

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 35
Product of the distinct prime numbers

The prime factorization of 245 is 7 × 5 × 7. Since it has a total of 3 prime factors.

Most popular turbo-numbers

Basic calculations (n = 245)

Multiplication

n×y
n×2 490
n×3 735
n×4 980
n×5 1225

Division

n÷y
n÷2 122.5
n÷3 81.666666666667
n÷3 61.25
n÷5 49

Exponentiation

ny
n2 60025
n3 14706125
n4 3603000625
n5 882735153125

Nth Root

y√n
2√n 15.652475842499
3√n 6.257324745676
4√n 3.9563209984149
5√n 3.0049220937458

Divisors of 245

1, 5, 7, 35, 49, 245

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 -244
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 245 can be divided by 6 positive divisors. The sum of these divisors (counting 245) is 1, the average is 0.16666666666667.

Base conversion 245

Base System Value
2 Binary 11110101
3 Ternary 100002
4 Quaternary 3311
5 Quinary 1440
6 Senary 1045
8 Octal 365
10 Decimal 245
12 Duodecimal 185
16 Hexadecimal f5
20 Vigesimal c5
36 Base36 6t

Cryptographic Hash Functions

md5 0266e33d3f546cb5436a10798e657d97
sha1 3aed9b0313f9226111de8aeabaedccf8db07d428
sha256 011af72a910ac4acf367eef9e6b761e0980842c30d4e9809840f4141d5163ede
sha512 46e59410cf5010798015775e98b4aff99a6d410d2322a6498fcf428d119ac463ccb70af91fe7404a6ab0fce33d2bc3a570a19c8dc06f75cf61d8ca10ff8b1275
ripemd-160 e5d952522d7549a592bf7c02639587e3315491d2

245 as geometric shapes

Circle

Radius = n
Diameter 490
Circumference 1539.380400259
Area 188574.09903173

Sphere

Radius = n
Volume 61600872.350364
Surface area 754296.39612691
Circumference 1539.380400259

Square

Length = n
Perimeter 980
Area 60025
Diagonal 346.48232278141

Cube

Length = n
Surface area 360150
Volume 14706125
Space diagonal 424.35244785437

Equilateral Triangle

Length = n
Perimeter 735
Area 25991.58743108
Altitude 212.17622392719

Triangular Pyramid

Length = n
Surface area 25991.58743108
Volume 1733133.4520795
Height 115.4941075938