5043
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 6892
- Proper Divisor Sum (Aliquot Sum)
- 1849
- 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
- 3280
- Möbius Function
- 0
- Radical
- 123
- Omega Function (Ω)
- 3
- 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
- 41
- 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
- Coordination sequence T6 for Zeolite Code MFI.at n=45A008169
- Coordination sequence for sigma-CrFe, Position Xc.at n=18A009961
- Pisot sequence E(9,17), a(n) = floor( a(n-1)^2/a(n-2) + 1/2 ).at n=10A014004
- 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 71.at n=0A031569
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 71.at n=0A031749
- a(n) = 3*n^2.at n=41A033428
- Numbers whose base-5 representation contains exactly two 1's and three 3's.at n=30A045243
- Numbers m such that there are precisely 3 groups of order m.at n=26A055561
- Sum of a(n) terms of 1/k^(2/3) first exceeds n.at n=49A056178
- Number of numbers whose cube root rounds to n.at n=41A058034
- p^2 + 2 where p is a prime.at n=19A061725
- Composite numbers whose sum of aliquot divisors as well as product of aliquot divisors is a perfect square.at n=45A064116
- Value of remainder r (see A065052) at start of n-th interval between special points in Recamán's sequence A005132.at n=14A065054
- Squarefree part of n equals bigomega(n).at n=37A069550
- Numbers k such that phi(k) mod core(k) = 1 where core(k) is the squarefree part of k.at n=39A069946
- Number of subsets of A = {1,2,...,n} that have the same center of gravity as A, i.e., (n+1)/2.at n=16A070925
- a(1) = 8; a(n) is smallest number > a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime.at n=38A074344
- 3p^2 where p runs through the primes.at n=12A079705
- Numbers k such that p=k^2+2 and p+2 are primes.at n=47A086381
- Position of A051912 in A093110. a(n) is the number of integers < A051912(n) that can be expressed as a sum of three terms from A051912.at n=32A093111