1191
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1592
- Proper Divisor Sum (Aliquot Sum)
- 401
- 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
- 792
- Möbius Function
- 1
- Radical
- 1191
- 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
- 49
- 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
- Eulerian numbers (Euler's triangle: column k=3 of A008292, column k=2 of A173018).at n=4A000460
- Eulerian numbers (Euler's triangle: column k=5 of A008292, column k=4 of A173018).at n=2A000505
- Central polygonal numbers: a(n) = n^2 - n + 1.at n=35A002061
- Divisors of 2^44 - 1.at n=13A003549
- a(n) = n^4 + (9/2)*n^3 + n^2 - (9/2)*n + 1.at n=5A003878
- a(n) = ceiling(n*phi^7), where phi is the golden ratio, A001622.at n=41A004962
- Number of symmetric plane partitions of n.at n=25A005987
- Number of subwords of length n in infinite word generated by a -> aab, b -> b.at n=52A006697
- Numbers k such that phi(k) = phi(sigma(k)).at n=43A006872
- Number of stable towers of 2 X 2 LEGO blocks.at n=7A007575
- Coordination sequence T1 for Zeolite Code JBW.at n=23A008121
- Triangle of Eulerian numbers T(n,k) (n >= 1, 1 <= k <= n) read by rows.at n=23A008292
- Triangle of Eulerian numbers T(n,k) (n >= 1, 1 <= k <= n) read by rows.at n=25A008292
- Coordination sequence for sigma-CrFe, Position Xb.at n=9A009960
- Numbers in the triangle of Eulerian numbers (A008292) that are not 1.at n=13A014449
- Numbers in the triangle of Eulerian numbers (A008292) that are not 1.at n=11A014449
- Odd numbers in the triangle of Eulerian numbers.at n=16A014459
- Odd numbers in the triangle of Eulerian numbers.at n=17A014459
- Odd numbers in the triangle of Eulerian numbers that are not 1.at n=5A014461
- Odd numbers in the triangle of Eulerian numbers that are not 1.at n=4A014461