6076
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 18
- Divisor Sum
- 12768
- Proper Divisor Sum (Aliquot Sum)
- 6692
- 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
- 2520
- Möbius Function
- 0
- Radical
- 434
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 3
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
- 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
- Number of strict first-order maximal independent sets in cycle graph.at n=30A007391
- a(n+2) = (a(n) - 1)*a(n+1) + 1, with (a(1), a(2)) = (2, 3).at n=6A007704
- Expansion of 1/(1-x^6-x^7-x^8-x^9-x^10).at n=52A017850
- Self-convolution of composite numbers.at n=20A023648
- Exactly half of first a(n) terms of A022300 are 1's (not known to be infinite).at n=5A025513
- Theta series of A2[hole]^4.at n=25A033690
- Base-6 palindromes that start with 4.at n=38A043013
- Numbers having four 4's in base 6.at n=8A043388
- Number of nonnegative solutions of x1^2 + x2^2 + ... + x8^2 = n.at n=30A045850
- 15-gonal (or pentadecagonal) numbers: n*(13n-11)/2.at n=31A051867
- 18-gonal (or octadecagonal) numbers: a(n) = n*(8*n-7).at n=28A051870
- Number of ways of numbering the faces of a cube with nonnegative integers so that the sum of the 6 numbers is n.at n=25A054473
- Nonprime numbers k such that k | sigma_3(k) + phi(k)^3.at n=12A055970
- Third spoke of a hexagonal spiral.at n=45A056107
- Numbers n such that n | 6^n + 4^n + 2^n.at n=49A057844
- Numbers k such that k * (1+i)^k - i is a Gaussian prime.at n=14A058772
- Even numbers n such that n^2*2^n + 1 is prime.at n=12A058779
- Numbers k such that k^2 * 2^k + 1 is prime.at n=19A058780
- n * (1+i)^n + i is a Gaussian prime.at n=19A058782
- Invert transform of odd numbers: a(n) = Sum_{k=1..n} (2*k+1)*a(n-k), a(0)=1.at n=6A060801