4865
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6720
- Proper Divisor Sum (Aliquot Sum)
- 1855
- 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
- 3312
- Möbius Function
- -1
- Radical
- 4865
- 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
- 46
- 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
- no
- Odd
- yes
Appears in sequences
- Numbers k such that 39*2^k + 1 is prime.at n=31A002269
- Number of strict 3rd-order maximal independent sets in cycle graph.at n=39A007392
- Coordination sequence T3 for Zeolite Code FER.at n=43A008108
- Number of intersection points of diagonals of an n-gon in general position, plus number of vertices.at n=20A014626
- a(n) = n*(4*n-1).at n=35A033991
- Number of partitions satisfying (cn(0,5) <= cn(2,5) and cn(0,5) <= cn(3,5) and cn(0,5) <= cn(1,5) and cn(0,5) <= cn(4,5)).at n=32A036801
- Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 2,0,1.at n=4A037516
- Distinct odd numbers in the numerators of the 1/3-Pascal triangle (by row).at n=32A046557
- Distinct odd numbers in writing first numerator and then denominator of each element to the right of the central elements of the 1/3-Pascal triangle (by row).at n=35A046561
- Number of 3 x n binary matrices without unit columns up to row and column permutations.at n=25A057524
- Numbers n such that binomial(2n, n) - 1 is prime.at n=30A066726
- Numbers with no zeros in their cubes such that the products of the digits of their cubes are also cubes.at n=34A067071
- a(n) is the unique positive integer m which has a self-conjugate partition whose parts are the first n primes.at n=28A067773
- a(n) is the smallest number such that gcd(a(n), sigma(a(n))) = n.at n=34A074391
- Least number requiring the base n to produce a prime by base reversal.at n=22A075244
- Map from binary trees of size n to the set of corresponding trivalent plane trees (tpt) represented as size 2n+1 general trees.at n=13A083930
- Smallest multiple of prime(n) of the form r*prime(n-1) + s*prime(n-2). r and s are positive integers.at n=31A085950
- Number of partitions into a square number of parts.at n=39A089333
- Number of partitions of n having positive even rank (the rank of a partition is the largest part minus the number of parts).at n=37A101708
- Positive integers whose sixth power is the sum of seven sixth powers (smallest primitive solutions).at n=13A132410