4881
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
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 6512
- Proper Divisor Sum (Aliquot Sum)
- 1631
- 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
- 3252
- Möbius Function
- 1
- Radical
- 4881
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
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
- 134
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- no
- Odd
- yes
Appears in sequences
- Coordination sequence T3 for Zeolite Code RUT.at n=46A009899
- a(1)=1, a(n) = 5*a(n-1) + n.at n=5A014827
- Numbers k such that the continued fraction for sqrt(k) has period 70.at n=12A020409
- Least m such that if r and s in {1/2, 1/5, 1/8,..., 1/(3n-1)}, satisfy r < s, then r < k/m < s for some integer k.at n=45A024823
- a(n) = least m such that if r and s in {1/1, 1/2, 1/3, ..., 1/n} satisfy r < s, then r < k/m < (k+2)/m < s for some integer k.at n=42A024840
- 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 46.at n=23A031544
- Lucky numbers with size of gaps equal to 14 (upper terms).at n=24A031897
- Numbers whose set of base-6 digits is {3,4}.at n=38A032830
- Numbers whose set of base-16 digits is {1,3}.at n=18A032923
- Number of fixed n-celled lattice animals in the f.c.c. lattice (12 nearest neighbors), or connected rhombic dodecahedra, or edge-connected cubes.at n=4A039742
- Smallest of three consecutive squarefree numbers k, k+1, k+2 of the form p*q where p and q are distinct primes.at n=46A039833
- Numbers having four 3's in base 6.at n=21A043384
- Fifth spoke of a hexagonal spiral.at n=40A056109
- Geometric mean of the digits = 4. In other words, the product of the digits is = 4^k where k is the number of digits.at n=32A061428
- Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=2, I={1}.at n=15A080014
- Pascal-(1,3,1) array.at n=50A081578
- Pascal-(1,3,1) array.at n=49A081578
- Sum of first n 3-almost primes.at n=46A086062
- Expansion of 1/((1-x)^2*(1-x^2)^2*(1-x^3)).at n=30A097701
- Semiprimes n such that 3*n - 2 is a square.at n=35A112393