6019
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 6496
- Proper Divisor Sum (Aliquot Sum)
- 477
- 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
- 5544
- Möbius Function
- 1
- Radical
- 6019
- 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
- 41
- 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
- Quadrinomial coefficients.at n=11A005719
- f-vectors for simplicial complexes of dimension at most 1 (graphs) on at most n-1 vertices.at n=33A011826
- Pseudoprimes to base 22.at n=32A020150
- Integers n >= 1 such that n divides 0!-1!+2!-3!+4!-...+(-1)^{n-1}(n-1)!.at n=28A064383
- Numbers in A064383 that are squarefree.at n=20A064392
- Semiprimes p1*p2 such that p2 > p1 and p2 mod p1 = 8.at n=34A064906
- a(n) = n*(6*n^2 - 7*n + 3)/2.at n=13A071230
- Numbers k such that there are exactly 8 numbers j for which binomial(k, floor(k/2)) / binomial(k,j) is an integer, i.e., A080383(k) = 8.at n=37A080386
- First differences of A084449.at n=22A084465
- Number of decimal digits in binomial(2*10^n, 10^n).at n=4A114501
- Semiprimes that are semiprimes turned upside-down.at n=32A119738
- Partial sums of floor(n^2/8).at n=52A122046
- Numbers ending in 1, 3, 7 or 9 such that either prepending or following them by one digit doesn't produce a prime.at n=31A124666
- Number of non-isomorphic maximal independent sets of the n-cycle graph.at n=46A127685
- Records in A014197.at n=51A131934
- Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in two by two blocks.at n=12A145861
- Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 1 one in any 4 X 4 X 4 subtriangle.at n=14A153903
- a(n) = (4*n^3 - 6*n^2 + 8*n + 3)/3.at n=17A161712
- Number of zero-sum -7..7 arrays of n elements with first through fourth differences also in -7..7.at n=5A201438
- Number of zero-sum -n..n arrays of 6 elements with first through fourth differences also in -n..n.at n=6A201441