21123105

21,123,105 is an odd composite number composed of four prime numbers multiplied together.

What does the number 21123105 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

21123105 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21123105:

3 × 5 × 43 × 32749

See below for interesting mathematical facts about the number 21123105 from the Numbermatics database.

Names of 21123105

Cardinal: 21123105 can be written as Twenty-one million, one hundred twenty-three thousand, one hundred five.

Scientific notation

Scientific notation: 2.1123105 × 10⁷

Factors of 21123105

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 4
Sum of prime factors: 32800

Divisors of 21123105

Number of divisors d(n): 16
Complete list of divisors:
1 3 5 15 43 129 215 645 32749 98247 163745 491235 1408207 4224621 7041035 21123105
Sum of all divisors σ(n): 34584000
Sum of proper divisors (its aliquot sum) s(n): 13460895
21123105 is a deficient number, because the sum of its proper divisors (13460895) is less than itself. Its deficiency is 7662210

Bases of 21123105

Binary: 1010000100101000000100001₂
Hexadecimal: 0x1425021
Base-36: CKQOX

Squares and roots of 21123105

21123105 squared (21123105²) is 446185564841025
21123105 cubed (21123105³) is 9424824535621279382625
The square root of 21123105 is 4595.9879242661
The cube root of 21123105 is 276.4304745367

Scales and comparisons

How big is 21123105?

21,123,105 seconds is equal to 34 weeks, 6 days, 11 hours, 31 minutes, 45 seconds.
To count from 1 to 21,123,105 would take you about two days!

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
A cube with a volume of 21123105 cubic inches would be around 23 feet tall.

Recreational maths with 21123105

21123105 backwards is 50132112
21123105 is a Harshad number.
The number of decimal digits it has is: 8
The sum of 21123105's digits is 15
More coming soon!

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The information we have on file for 21123105 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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