3549
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 5856
- Proper Divisor Sum (Aliquot Sum)
- 2307
- 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
- 1872
- Möbius Function
- 0
- Radical
- 273
- 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
- 56
- 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
- no
- Odd
- yes
Appears in sequences
- Weight distribution of Karlin's [28,14,8] double circulant code.at n=8A002606
- Weight distribution of Karlin's [28,14,8] double circulant code.at n=6A002606
- Restricted combinations.at n=16A006500
- Coordination sequence T1 for Zeolite Code LTL.at n=44A008138
- Join 2n points on a line with n arcs above the line; form graph with the arcs as nodes, joining 2 nodes when the arcs cross. a(n) is the number of cases in which the graph is a path.at n=9A008909
- Bisection of A001400.at n=37A014125
- a(n) = (1/12)*(n+5)*(n+1)*n^2.at n=13A014205
- Numbers k that divide s(k), where s(1)=1, s(j)=9*s(j-1)+j.at n=25A014857
- Integers k such that k divides 22^k - 1.at n=37A014959
- a(n) = (2*n - 5)n^2.at n=13A015240
- Coordination sequence T1 for Zeolite Code OSI.at n=39A016430
- a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026725.at n=5A027209
- 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 38.at n=28A031536
- Numbers whose base-16 expansion has no run of digits with length < 2.at n=27A033029
- Numbers in which all pairs of consecutive base-4 digits differ by 2.at n=17A033082
- Divisors = 1 (mod 4) of Descartes's 198585576189.at n=39A033870
- Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 3,1.at n=5A037583
- Numbers n such that string 5,4 occurs in the base 10 representation of n but not of n+1.at n=38A044767
- Numbers whose base-4 representation contains exactly three 1's and three 3's.at n=14A045127
- Has both a primitive and imprimitive representation as x^2 + xy + y^2.at n=26A045897