6485
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
- 4
- Divisor Sum
- 7788
- Proper Divisor Sum (Aliquot Sum)
- 1303
- 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
- 5184
- Möbius Function
- 1
- Radical
- 6485
- 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
- 31
- 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
- Number of paths on square lattice.at n=8A006191
- Pseudoprimes to base 36.at n=40A020164
- Numbers k such that the continued fraction for sqrt(k) has period 17.at n=34A020356
- Denominators of continued fraction convergents to sqrt(13).at n=14A041019
- Denominators of continued fraction convergents to sqrt(52).at n=8A041089
- Denominators of continued fraction convergents to sqrt(117).at n=8A041213
- Denominators of continued fraction convergents to sqrt(208).at n=8A041387
- Base-6 palindromes that start with 5.at n=14A043014
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 5.at n=14A051970
- McKay-Thompson series of class 24I for Monster.at n=24A058579
- McKay-Thompson series of class 28a for Monster.at n=28A058610
- Number of (unordered) ways of making change for n cents using coins of 1/2, 1, 2, 3, 5, 10, 20, 25, 50, 100 cents (all historical U.S.A. coinage denominations up to 100 cents).at n=36A067997
- a(n) = Fibonacci(2n+1) + n*2^(n-1).at n=9A081663
- Let p(k) be the number of partitions of k (A000041); a(n) = Sum_{1<=k<=n, gcd(k,n)=1} p(k).at n=24A096223
- Numbers whose set of base 6 digits is {0,5}.at n=17A097252
- Numbers n such that n^2-6 and n^2+6 are both prime.at n=32A108403
- Numbers k such that (2*k)!/k!-1 is prime.at n=13A112853
- Partial sums of A120405.at n=55A120768
- A 4 X 4 permutation-free magic square with magic sum 19998.at n=14A125522
- Numbers k such that 3*k+2, 4*k+3 and 5*k+4 are primes.at n=42A126956