4859
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 26
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 5016
- Proper Divisor Sum (Aliquot Sum)
- 157
- 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
- 4704
- Möbius Function
- 1
- Radical
- 4859
- 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
- 121
- 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
- Divisors of 2^28 - 1.at n=24A003536
- Fermat pseudoprimes to base 4.at n=32A020136
- Pseudoprimes to base 16.at n=41A020144
- Pseudoprimes to base 85.at n=40A020213
- Strong pseudoprimes to base 16.at n=25A020242
- Strong pseudoprimes to base 85.at n=6A020311
- Fibonacci sequence beginning 3, 19.at n=13A022128
- a(n) = [ a(n-1)/a(1) + a(n-3)/a(3) + a(n-5)/a(5) + ... ], for n >= 3.at n=27A022865
- Numbers with exactly 6 2's in their ternary expansion.at n=29A023704
- In base 11, a(n) = sum of digits of Lucas(a(n)).at n=40A025491
- 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 69.at n=9A031567
- T(n,n+2), array T given by A047000.at n=7A047007
- Numbers k such that the smoothly undulating palindromic number (98*10^k - 89)/99 is a prime.at n=3A062232
- Triangle of number of permutations by barycenter.at n=46A062866
- Triangle of number of permutations by barycenter.at n=42A062866
- Numbers k such that Euler phi(k) / Carmichael lambda(k) = 14.at n=9A066696
- Numbers n such that the trajectory of n under the `3x+1' map reaches n - 1.at n=38A070991
- Main diagonal of table A083044.at n=12A083045
- Number of evil primes (A027699) in range ]2^n,2^(n+1)].at n=16A095006
- Number of A095316-primes in range [2^n,2^(n+1)].at n=15A095326