3765
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6048
- Proper Divisor Sum (Aliquot Sum)
- 2283
- 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
- 2000
- Möbius Function
- -1
- Radical
- 3765
- Omega Function (Ω)
- 3
- 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
- 131
- 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
- Number of partitions of n into at most 5 parts.at n=50A001401
- Number of series-reduced planted trees with n nodes.at n=18A001678
- 11*n^2 + 11*n + 3.at n=18A006222
- Coordination sequence T4 for Zeolite Code ZON.at n=43A009922
- Coordination sequence for FeS2-Marcasite, S position.at n=30A009954
- Expansion of Product_{k>=1} (1 - x^k)^(-k^2).at n=9A023871
- Number of partitions of n in which the greatest part is 5.at n=55A026811
- Coordination sequence T1 for Zeolite Code ITE.at n=42A027369
- Coordination sequence T2 for Zeolite Code ITE.at n=42A027370
- Coordination sequence for Zeolite Code DFT.at n=42A038408
- Denominators of continued fraction convergents to sqrt(586).at n=9A042123
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 8.at n=24A051973
- Number of primitive (period n) periodic palindromes using exactly three different symbols.at n=13A056499
- Consider the version of the Collatz or 3x+1 problem where x -> x/2 if x is even, x -> (3x+1)/2 if x is odd. Define the stopping time of x to be the number of steps needed to reach 1. Sequence gives the number of integers x with stopping time n.at n=30A060322
- Integers n > 879 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 879.at n=16A063052
- Number of 3-dimensional polyominoes (or polycubes) with n cells and rotational symmetry group of order exactly 2.at n=10A066454
- Sum of terms in n-th group in A075352.at n=31A075356
- Numbers k with gcd(2^k-1, Fibonacci(k)) > 1 and not divisible by 2 or 11. Odd members of A074776 not divisible by 11.at n=43A079506
- Convolution of odd primes with themselves.at n=12A084370
- Numbers k such that (k-1)*binomial(2k,k) + 1 is prime.at n=39A085793