1181
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
- 1
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 1182
- Proper Divisor Sum (Aliquot Sum)
- 1
- 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
- 1180
- Möbius Function
- -1
- Radical
- 1181
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 57
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 194
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Primes with 7 as smallest primitive root.at n=11A001126
- Primes p such that the multiplicative order of 2 modulo p is (p-1)/5.at n=3A001135
- Largest prime factor of 9^n + 1.at n=5A002592
- Primes p with a Fibonacci primitive root g, i.e., such that g^2 = g + 1 (mod p).at n=52A003147
- Numbers that are the sum of 12 positive 6th powers.at n=20A003368
- Class 4- primes (for definition see A005109).at n=29A005112
- Total number of fixed points in planted trees with n nodes.at n=13A005202
- Emirps (primes whose reversal is a different prime).at n=48A006567
- Number of connected vertex-transitive graphs with n nodes.at n=28A006800
- Primes with both 10 and -10 as primitive root.at n=36A007349
- Primes of the form 8k + 5.at n=50A007521
- Reflectable emirps.at n=7A007628
- Primes of the form 2*k^2 + 29.at n=24A007641
- Coordination sequence T4 for Zeolite Code LTN.at n=24A008143
- Coordination sequence T3 for Zeolite Code MEL.at n=22A008152
- Number of necklaces of sets of beads containing a total of n beads.at n=13A008965
- Coordination sequence T2 for Zeolite Code VSV.at n=22A009915
- Minimal number of people to give a 50% probability of having at least n coincident birthdays in one year.at n=9A014088
- Numbers k such that the continued fraction for sqrt(k) has period 25.at n=3A020364
- Primes that contain digits 1 and 8 only.at n=4A020456