11042
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 16566
- Proper Divisor Sum (Aliquot Sum)
- 5524
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5520
- Möbius Function
- 1
- Radical
- 11042
- 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
- 130
- 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
- a(n) = a(n-1) + a(n-4), starting 1,1,1,3.at n=29A014101
- Generalized Catalan Numbers x^2*A(x)^2 -(1-x+x^2+x^3+x^4)*A(x) + 1 =0.at n=17A023421
- Coefficients of monic primitive irreducible polynomials over GF(5) listed in lexicographic order.at n=37A058950
- Sum of decimal digits of square of divisors of n equals sum of square of digits of n.at n=40A067344
- a(n) = -a(n-2) - a(n-3).at n=46A112455
- Semiprimes in A056105.at n=26A113519
- Site percolation series for Kagome lattice.at n=22A120549
- Cyclops semiprimes.at n=37A160725
- Numbers n with property that there is a different number m such that the lunar squares n*n and m*m are the same.at n=28A181319
- a(n) = n*Fibonacci(n) * Sum_{d|n} 1/(d*Fibonacci(d)).at n=14A203319
- Number of (w,x,y,z) with all terms in {1,...,n} and w*x+y*z>=n^2.at n=18A212132
- a(n) = 6 + 4*(-1)^n + (2+sqrt(3))^n + (2-sqrt(3))^n + 2*(1+sqrt(2))^n + 2*(1-sqrt(2))^n.at n=7A232999
- Number of partitions p of n such that the multiplicity of the mean of p is a part of p.at n=52A240491
- Composite numbers whose concatenation of their aliquot parts, in ascending order, is a palindrome.at n=27A249300
- Number of n X 4 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=13A302676
- Number of connected graphs with n vertices which have a planar square.at n=14A381961