14816
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 29232
- Proper Divisor Sum (Aliquot Sum)
- 14416
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7392
- Möbius Function
- 0
- Radical
- 926
- Omega Function (Ω)
- 6
- 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
- 133
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Numbers having four 2's in base 9.at n=21A043464
- a(n) = A045820(n)/2.at n=15A045822
- a(1) = 1; a(n+1) = sum of terms in continued fraction for the sum of the continued fractions, [a(1); a(2), a(3),...,a(n-1),a(n)] and [a(n); a(n-1), a(n-2),...,a(2), a(1)].at n=17A058081
- Numbers k such that the largest prime factor of k is equal to the sum of primes dividing k+1 (with repetition).at n=18A071861
- Breadth-first-wise A014486-like encoding of A080299-trees.at n=5A080313
- a(n) = round(10000*log(n/10)).at n=43A104077
- Numbers k such that |2^k - 57| is prime.at n=41A165778
- Coefficient of x in the reduction by x^2 -> x+1 of the polynomial p(n,x) defined at Comments.at n=15A192978
- Sum of reflection (or absolute) lengths of all elements in the Coxeter group of type B_n.at n=4A197130
- Shifts 5 places left under Euler transform with a(0)=0 and a(n)=1 for n<5.at n=27A218022
- Number of length 3+1 0..n arrays with the sum of the squares of adjacent differences multiplied by some arrangement of +-1 equal to zero.at n=40A250278
- Index of record values in A247190.at n=36A250985
- Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2) + 3, where a(0) = 1, a(1) = 2, b(0) = 3.at n=16A294535
- Multiples of 1852.at n=8A303272
- a(n) is the number of regions formed by n-secting the angles of an octagon.at n=33A335769
- Number of edges among all distinct circles that can be constructed from n equally spaced points along a line using only a compass.at n=12A359254
- G.f. A(x) satisfies A(x) = 1/( 1 - x * (1 + 4*x)^(1/2) * A(x) ).at n=8A372115
- Number of inequivalent 2*n X 6 binary arrays with row sums 3 and column sums n up to row and column permutations.at n=11A377003