6204
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
- 24
- Divisor Sum
- 16128
- Proper Divisor Sum (Aliquot Sum)
- 9924
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1840
- Möbius Function
- 0
- Radical
- 3102
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 155
- 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
- yes
- Odd
- no
Appears in sequences
- Coordination sequence T2 for Coesite.at n=42A008268
- Number of ordered triples of integers from [ 2,n ] with no global factor.at n=34A015633
- a(n) = a(n-3) + a(n-4), with a(0)=1, a(1)=a(2)=0, a(3)=1.at n=50A017817
- Number of lines through exactly 7 points of an n X n grid of points.at n=53A018814
- Even elements in the 5-Pascal triangle A028313.at n=40A028317
- Distinct elements in the 5-Pascal triangle A028313.at n=48A028318
- Distinct even elements in the 5-Pascal triangle A028313.at n=22A028320
- Central elements in the 5-Pascal triangle A028313.at n=7A028322
- Base-7 palindromes that start with 2.at n=44A043016
- Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 7 skipped primes.at n=35A050774
- Numbers which are the sum of their proper divisors containing the digit 0.at n=39A059461
- Number of compositions of n such that two adjacent parts are not equal modulo 2.at n=23A062200
- Quintisection of 1/(1-x^3-x^4).at n=10A099101
- Expansion of 1/((1+x)^3-x^4).at n=14A107068
- a(1) = 1, a(2) = a(3) = a(4) = 0; a(n) = a(n-4) + a(n-3) for n > 4.at n=54A127838
- Expansion of x/((1 - x - x^4)*(1 - x)^5).at n=12A145134
- Integers k such that (k^3)/3 is the average of a pair of twin primes.at n=37A152788
- a(0)=3; a(n) = n^2 + a(n-1) for n>0.at n=26A153057
- Number of planar n X n X n binary triangular grids symmetric both under 120-degree rotation and reflection with no more than 1 one in any 4 X 4 X 4 subtriangle.at n=25A153904
- Number of binary strings of length n with no substrings equal to 0001 0101 or 1100.at n=14A164474