5585
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
- 6708
- Proper Divisor Sum (Aliquot Sum)
- 1123
- 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
- 4464
- Möbius Function
- 1
- Radical
- 5585
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 129
- 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 free planar polyenoids with n nodes.at n=11A000942
- Numbers k such that the continued fraction for sqrt(k) has period 23.at n=20A020362
- Base-8 palindromes that start with 1.at n=41A043021
- Numbers having three 5's in base 10.at n=26A043511
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 17.at n=6A051982
- Triangle read by rows: monoids of order n with k idempotents.at n=22A058137
- Monoids of order n with 2 idempotents.at n=5A058138
- A list of equal temperaments (equal divisions of the octave) whose nearest scale steps are closer and closer approximations to six complementary pairs of ratios which generate simple musical tones (scale steps): 8/7 and 7/4, 6/5 and 5/3, 16/13 and 13/8, 5/4 and 8/5, 4/3 and 3/2 and 11/8 and 16/11.at n=42A060233
- Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 9 (most significant digit on right).at n=6A061938
- Sum of the first n safe primes.at n=20A066869
- Number of distinct products i*j*k*l for 1 <= i <= j <= k <= l <= n.at n=25A100437
- Numerators of e.g.f. cosec(arctanh(x)).at n=3A102076
- Number of partitions of n into Fibonacci number of integer parts.at n=38A102848
- G.f.: Product_{i>=1} (1 - 2*(-x)^i)/(1 - (-x)^i)^2.at n=45A104510
- Near-repdigit semiprimes with 5 as repeated digit.at n=22A105986
- Nearest integer to locations of increasingly large peaks of abs(zeta(0.5 + i*2*(Pi/log(2))*t)) for increasing real t.at n=42A117536
- Equal divisions of the octave of decreasing thirteen-limit Pepper ambiguity.at n=15A117558
- Equal divisions of the octave of decreasing fifteen-limit Pepper ambiguity.at n=13A117559
- Composite numbers k such that k+d+1 is prime for all divisors d of k greater than 1.at n=38A120776
- Numbers k such that continued fraction of (1 + sqrt(k))/2 has period 17.at n=15A146340