8074
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
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 13248
- Proper Divisor Sum (Aliquot Sum)
- 5174
- 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
- 3660
- Möbius Function
- -1
- Radical
- 8074
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 114
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Coefficient of x^6 in expansion of (1+x+x^2)^n.at n=9A005714
- Maximal length of rook tour on an n X n board.at n=22A006071
- Fibonacci sequence beginning 2, 12.at n=15A022368
- a(n) = T(2*n, n), T given by A027907.at n=6A027908
- T(n,[ n/2 ]), T given by A027907.at n=12A027913
- Numbers whose base-6 representation has exactly 6 runs.at n=33A043614
- Numbers whose base-5 representation contains exactly three 2's and three 4's.at n=1A045292
- Centered 23-gonal numbers.at n=26A069174
- One-sixth the area of the smallest primitive d-arithmetic triangle, where d=A072330(n).at n=38A072360
- a(n) = 15*n^2 + 6*n + 1.at n=23A080861
- Number of unrooted n-edge maps in the plane (planar map with a distinguished outside face).at n=6A103937
- Triangle read by rows: T(n,k) = number of edge-rooted unlabeled graphs having n nodes and k edges, n > 0, 0 < k <= n*(n-1)/2.at n=67A126123
- The Wiener index of a chain of n triangles (i.e., joined like VVV..VV; here V is a triangle!).at n=21A143941
- Expansion of g.f. 1 - 2*x*(-7 - 10*x + x^2)/(x - 1)^4.at n=11A152100
- Number of rhombuses on a (n+1)X7 grid.at n=42A190095
- a(n) = sum(abs(stirling1(n+1,k+1))*(-1)^(n-k)*k!^2,k=0..n).at n=5A192556
- Numbers k such that sum of the divisors of k equals the sum of the reversals of the divisors of k. Numbers with all palindrome divisors are not in the sequence.at n=14A196677
- Numbers k that divide the sum of the first k numbers from Flavius Josephus's sieve (A099074).at n=18A218665
- a(n) = Sum_{i=0..n} digsum(i)^3, where digsum(i) = A007953(i).at n=28A231688
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 549", based on the 5-celled von Neumann neighborhood.at n=19A272844