1197
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 2080
- Proper Divisor Sum (Aliquot Sum)
- 883
- 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
- 648
- Möbius Function
- 0
- Radical
- 399
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
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
- 119
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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 positive integers <= 2^n of form x^2 + y^2.at n=12A000050
- Number of 6-dimensional partitions of n.at n=5A000416
- Fermat coefficients.at n=8A000970
- a(n) = 20*a(n-1) - a(n-2) with a(0) = 0, a(1) = 3.at n=3A001084
- Numbers k such that (k / product of digits of k) is 1 or a prime.at n=21A001103
- Number of partitions of n into parts 2, 3, 4, 5, 6, 7.at n=46A001996
- Numbers of the form (p^2 - 1)/120 where p is 1 or prime.at n=33A002381
- Expansion of 1/((1-x)^3 (1-x^2)^2 (1-x^3) (1-x^4)).at n=12A002626
- Divisors of 2^18 - 1.at n=18A003528
- Number of partitions of n of the form a_1*b_1^2 + a_2*b_2^2 + ...; number of semisimple rings with p^n elements for any prime p.at n=20A004101
- Related to representations as sums of Fibonacci numbers.at n=27A006133
- Moebius transform of triangular numbers.at n=48A007438
- Numbers that are divisible by the product of their digits.at n=42A007602
- Coordination sequence T3 for Zeolite Code FER.at n=21A008108
- Molien series for cyclic group of order 5.at n=17A008646
- Expansion of e.g.f. log(1+tanh(x)/cosh(x)).at n=7A009401
- Coordination sequence T3 for Zeolite Code -ROG.at n=26A009861
- Coordination sequence T3 for Zeolite Code RTH.at n=24A009895
- a(n) = floor(C(n,4)/5).at n=21A011795
- Expansion of e.g.f. log(cosh(x) + tanh(x)).at n=7A013191