5266
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 7902
- Proper Divisor Sum (Aliquot Sum)
- 2636
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 2632
- Möbius Function
- 1
- Radical
- 5266
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 41
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Representation degeneracies for Ramond strings.at n=18A005303
- Coordination sequence T9 for Zeolite Code MFI.at n=46A008172
- a(n) = floor(binomial(n,5)/5).at n=22A011851
- Powers of fifth root of 3 rounded down.at n=39A018120
- Numbers k such that k^2 is palindromic in base 7.at n=35A029992
- Schoenheim bound L_1(n,n-5,n-6).at n=15A036837
- Numbers whose maximal base-8 run length is 4.at n=15A037995
- Numbers having four 2's in base 8.at n=1A043432
- Numbers n such that 83*2^n-1 is prime.at n=28A050567
- Numbers k such that the sum of digits of k^k is a square.at n=42A066236
- Centered 15-gonal numbers: a(n) = (15*n^2 - 15*n + 2)/2.at n=26A069128
- Number of square plane partitions of n.at n=29A089299
- Square array of numbers read by antidiagonals where T(n,k) = ((k+3)*(k+2)^n-2)/(k+1).at n=59A090842
- a(n) = floor(6^n/5^n).at n=47A094983
- a(n) = 2*a(n-1) - a(n-4) + a(n-5) with a(-1)=a(0)=a(1)=1, a(2)=2, a(3)=4, a(4)=7.at n=15A108758
- First differences of A000043.at n=19A134458
- a(n) = (7*n^2 - 17*n + 12)/2.at n=39A140065
- Numbers k such that A120292(k) is composite.at n=26A141779
- a(n) = 9^n-6^n+1.at n=4A155652
- A Deutsch-Fibonacci triangle.at n=48A188461