5526
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 12012
- Proper Divisor Sum (Aliquot Sum)
- 6486
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1836
- Möbius Function
- 0
- Radical
- 1842
- Omega Function (Ω)
- 4
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 41
- Smith Number
- yes
- 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 that are the sum of 11 positive 7th powers.at n=32A003378
- Coordination sequence T5 for Zeolite Code VET.at n=44A009906
- Numbers k such that k | 8^k + 8.at n=19A015897
- Theta series of 6-dimensional perfect lattice P6.6 = A6,1.at n=34A029695
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 74.at n=5A031572
- a(n) = (n + 2)*(2*n^2 - n + 3)/6.at n=25A056520
- 1/19 the number of colorings of an n X n square array with 19 colors.at n=1A068269
- Centered 17-gonal numbers: (17*n^2 - 17*n + 2)/2.at n=25A069130
- q-factorial numbers 3!_q.at n=17A069778
- a(1) = 1; a(n) = 1 + Sum_{i=1..n} Product_{j=i..2*i-1} (n-j).at n=11A072374
- Expansion of (1 - x)/(1 - 3*x - 2*x^2 - 2*x^3).at n=7A077839
- Numbers k such that k*prime(k) -+ 1 are twin primes.at n=27A085637
- q such that p^4 + q^4 = r^4 + s^4 = a(n).at n=41A088665
- Numbers of the form a^5 + b^4 with a, b > 0.at n=38A100294
- Numbers k such that k^2 is a palindrome when written in base 17.at n=31A118651
- Triangle read by rows: numbers of isomers of unbranched a-4-catapolynonagons.at n=29A120650
- Unbranched a-4-catapolynonagons (see Brunvoll reference for precise definition).at n=5A121124
- Row sums of number triangle A122851.at n=12A122852
- a(n) = 153*n + 18.at n=36A139618
- Number of binary words of length n containing at least one subword 100001 and no subwords 10^{i}1 with i<4.at n=31A143284