3556
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
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 7168
- Proper Divisor Sum (Aliquot Sum)
- 3612
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 1512
- Möbius Function
- 0
- Radical
- 1778
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 149
- 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
- Number of nonequivalent dissections of an n-gon into 3 polygons by nonintersecting diagonals rooted at a cell up to rotation and reflection.at n=27A003452
- Number of extended Skolem sequences of order n.at n=7A004077
- Coefficients of the '2nd-order' mock theta function A(q).at n=29A006304
- Coordination sequence T7 for Zeolite Code NES.at n=38A008211
- Coordination sequence T2 for Zeolite Code -WEN.at n=43A009863
- Coordination sequence T7 for Zeolite Code CON.at n=42A009874
- Coordination sequence T1 for Zeolite Code VSV.at n=38A009914
- Pseudoprimes to base 37.at n=45A020165
- Numbers k such that the continued fraction for sqrt(k) has period 42.at n=41A020381
- (d(n)-r(n))/5, where d = A026066 and r is the periodic sequence with fundamental period (0,3,1,0,1).at n=35A026068
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 24 ones.at n=41A031792
- Arrange digits of cubes in ascending order.at n=37A032553
- "DHK" (bracelet, identity, unlabeled) transform of A035353.at n=10A035354
- Numbers n such that string 5,6 occurs in the base 10 representation of n but not of n-1.at n=38A044388
- Numbers n such that string 5,6 occurs in the base 10 representation of n but not of n+1.at n=38A044769
- Triangle of numbers a(n,k), 0 <= k <= n: number of set partitions of {1,2,...,n} in which exactly k of the blocks have been distinguished.at n=31A049020
- Open 3-dimensional ball numbers (version 3): a(n) is the number of integer points (i,j,k) contained in an open ball of diameter n, centered at (1/2,1/2,0).at n=19A053595
- Number of primes p with n! < p <= (n+1)!.at n=7A061232
- a(n) is the total number of positive integral solutions (x,y), order being taken into account, to the equation 1/x + 1/y + 1/z = 1/n.at n=39A082604
- Least integers that satisfy Sum_{n>=1} 1/a(n)^z = 0, where a(1)=1, a(n+1) > a(n) and z = i*Pi/4.at n=5A084815