3043
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3240
- Proper Divisor Sum (Aliquot Sum)
- 197
- 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
- 2848
- Möbius Function
- 1
- Radical
- 3043
- 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
- 110
- 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 primes < prime(n)^2.at n=38A000879
- Coordination sequence T1 for Zeolite Code ACO, ASV, EDI, and THO.at n=39A008084
- a(n)-th squarefree is sum of first k squarefrees for some k.at n=46A020643
- a(n) = n*(21*n + 1)/2.at n=17A022279
- a(n) = sum of cubes of p(j) - p(i), for 0 <= i < j <= n, where p(0) = 1.at n=4A024527
- a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = (F(2), F(3), ...).at n=12A024591
- Sequence A025513 divided by 2.at n=9A025514
- Position of first occurrence of n in continued fraction for Copeland-Erdős constant.at n=47A033309
- Duplicate of A008084.at n=39A033598
- Numbers k such that the string 5,1 occurs in the base 9 representation of k but not of k-1.at n=41A044297
- Numbers n such that string 4,3 occurs in the base 10 representation of n but not of n-1.at n=33A044375
- Numbers n such that string 4,3 occurs in the base 10 representation of n but not of n+1.at n=33A044756
- a(n) = 1 + Sum_{i=1..n} phi(i)^2.at n=28A049454
- Number of increasing arithmetic progressions in {1,2,3,...,n}, including trivial arithmetic progressions of lengths 1 and 2.at n=41A051336
- Duplicate of A008084.at n=39A057310
- Numbers n such that x^n + x^5 + x^4 + x^3 + x^2 + x + 1 is irreducible over GF(2).at n=40A057484
- a(n) = 2*n^2 + 1.at n=39A058331
- Number of linear n-celled polyominoes, those with the property that a line can be drawn that intersects the interior of every cell.at n=48A060677
- Semiprimes p1*p2 such that p2 mod p1 = 9, with p2 > p1.at n=15A064907
- Least k > n^2 such that (k^3+1)/(n^2+1) is an integer.at n=38A066506