4511
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4872
- Proper Divisor Sum (Aliquot Sum)
- 361
- 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
- 4152
- Möbius Function
- 1
- Radical
- 4511
- 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
- 152
- 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
- Numbers that are the sum of 12 positive 7th powers.at n=26A003379
- Minimal absolute value of discriminants of number fields of degree n with exactly 2 (1 pair of) complex embeddings.at n=3A006555
- Smallest positive number that can be written as sum of distinct Fibonacci numbers in n ways.at n=50A013583
- Conjectured dimensions of spaces of weight systems of chord diagrams.at n=16A014595
- a(n)-th prime is sum of first k primes for some k.at n=15A020641
- Discriminants of quintic fields with 2 complex conjugates (negated).at n=0A023684
- a(n) = least m such that if r and s in {1/1, 1/4, 1/7, ..., 1/(3n-2)} satisfy r < s, then r < k/m < (k+1)/m < s for some integer k.at n=30A024836
- a(n) = least m such that if r and s in {1/1, 1/3, 1/5, ..., 1/(2n-1)} satisfy r < s, then r < k/m < (k+2)/m < s for some integer k.at n=29A024841
- Least term in period of continued fraction for sqrt(n) is 6.at n=25A031430
- Coordination sequence T4 for Zeolite Code CFI.at n=44A033602
- Conjecturally, largest attractor in '3x+(2n+1)' problem.at n=32A039515
- a(n)=(s(n)+3)/9, where s(n)=n-th base 9 palindrome that starts with 6.at n=35A043077
- Maximal elements of pairs of "Super Unitary Amicable Numbers", sorted by their minimal elements.at n=17A045614
- Sequence A001033 gives the numbers n such that the sum of the squares of n consecutive odd numbers x^2 + (x+2)^2 + ... +(x+2n-2)^2 = k^2 for some integer k. For each n, this sequence gives the least value of k.at n=12A056132
- Number of irreducible representations of the symmetric group S_n such that their degree is divisible by 3.at n=28A061569
- Semiprimes p1*p2 such that p2 mod p1 = 9, with p2 > p1.at n=22A064907
- a(1) = 10; a(n) is smallest number > a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime.at n=40A074346
- Least non-balanced x (i.e., not in A020492) such that sigma(2n-1,x)/phi(x) is an integer.at n=20A078539
- Least non-balanced x (i.e., not in A020492) such that sigma(p(n),x)/phi(x) is an integer, where p(n) = n-th prime.at n=13A078540
- Spiro-tribonacci numbers: a(n) = sum of three previous terms that are nearest when terms arranged in a spiral.at n=26A092360