11478
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 22968
- Proper Divisor Sum (Aliquot Sum)
- 11490
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 3824
- Möbius Function
- -1
- Radical
- 11478
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 174
- 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
- Magic numbers: atoms with full shells containing any of these numbers of electrons are considered electronically stable.at n=38A018227
- Partial sums of A001157: Sum_{j=1..n} sigma_2(j).at n=29A064602
- Pseudo-random numbers: MS C 6.0 version.at n=6A084275
- a(n) = prime(n) + prime(n^2).at n=36A092504
- Ramanujan numbers (A000594) read mod 23^3.at n=7A126847
- Numbers k such that k and k^2 use only the digits 1, 3, 4, 7 and 8.at n=6A137028
- Number of n X 3 1..2 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nonincreasing order.at n=38A166830
- Values x for records of the minima of the positive distance d between the ninth power of a positive integer x and the square of an integer y such that d = x^9 - y^2 (x <> k^2 and y <> k^9).at n=23A179791
- Number of different positions in which a square with side length k, 1 <= k <= n - floor(n/3), can be placed within a bi-symmetric triangle of 1 X 1 squares of height n.at n=35A241526
- Least positive integer k such that prime(prime(k)), prime(prime(k*n)), prime(p) and prime(q) form a 4-term arithmetic progression for some pair of primes p and q.at n=30A261462
- Numbers k such that (17*10^k + 13)/3 is prime.at n=24A272059
- Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1)*b(n-2), where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4, and (a(n)) and (b(n)) are increasing complementary sequences.at n=13A295363
- Number of n X n 0..1 arrays with each 1 adjacent to 1, 2 or 3 king-move neighboring 1's.at n=3A296681
- Number of nX4 0..1 arrays with each 1 adjacent to 1, 2 or 3 king-move neighboring 1s.at n=3A296684
- T(n,k)=Number of nXk 0..1 arrays with each 1 adjacent to 1, 2 or 3 king-move neighboring 1s.at n=24A296688
- Number of non-isomorphic set-systems of weight n with at least one endpoint.at n=12A330052
- Expansion of (1/x) * Series_Reversion( x*(1-x)^2/(1-x-x^4) ).at n=11A366088