4541
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4800
- Proper Divisor Sum (Aliquot Sum)
- 259
- 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
- 4284
- Möbius Function
- 1
- Radical
- 4541
- 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
- 64
- 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 graphs with n nodes and n-4 edges.at n=13A001432
- Coordination sequence T4 for Zeolite Code SGT.at n=42A008232
- Coordination sequence T2 for Zeolite Code RSN.at n=44A009886
- Numbers k such that the continued fraction for sqrt(k) has period 58.at n=21A020397
- Decimal part of a(n)^(1/7) starts with n so that a(n) < a(n+1).at n=33A034072
- Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 18.at n=33A050967
- Matrix inverse of triangle A055340(n+1,k).at n=48A055347
- Number of points in Z^10 of norm <= n.at n=2A055416
- Number of points in Z^n of norm <= 2.at n=10A055426
- a(n) = Sum_{d|n} d*prime(d).at n=29A061150
- Euler transform of sigma(n), cf. A000203.at n=12A061256
- Semiprimes p1*p2 such that p2 > p1 and p2 mod p1 = 11.at n=15A064909
- Half the number of 3 X n binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.at n=3A069396
- Half the number of n X 5 binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.at n=2A069405
- Duplicate of A061256.at n=12A079860
- A puzzle: reverse digits of n^2 + 10.at n=38A097990
- A puzzle: reverse digits of n^2 + 10.at n=38A097991
- Numbers n such that 2^n+25229 is prime.at n=45A103148
- Numbers n for which 12n+1, 12n+5, 12n+7 and 12n+11 are primes.at n=28A123985
- Numerators of the continued fraction convergents of the decimal concatenation of the lower bound of twin primes.at n=15A128844