11305
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 17280
- Proper Divisor Sum (Aliquot Sum)
- 5975
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6912
- Möbius Function
- 1
- Radical
- 11305
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- 86
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Fermat pseudoprimes to base 2, also called Sarrus numbers or Poulet numbers.at n=24A001567
- a(n) = smallest pseudoprime to base 2 with n prime factors.at n=2A007011
- "Pascal sweep" for k=10: draw a horizontal line through the 1 at C(k,0) in Pascal's triangle; rotate this line and record the sum of the numbers on it (excluding the initial 1).at n=52A009550
- Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=16A013594
- Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=14A013594
- Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=17A013594
- Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=20A013594
- Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=19A013594
- Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=15A013594
- Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=22A013594
- Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=18A013594
- Pseudoprimes to base 13.at n=30A020141
- Pseudoprimes to base 33.at n=32A020161
- Pseudoprimes to base 52.at n=35A020180
- Pseudoprimes to base 66.at n=31A020194
- Pseudoprimes to base 69.at n=36A020197
- Pseudoprimes to base 72.at n=33A020200
- Pseudoprimes to base 86.at n=44A020214
- Denominator of Bernoulli(2n+2) - Bernoulli(2n).at n=8A029763
- Number of compositions (ordered partitions) of n into distinct parts.at n=26A032020