4171
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4312
- Proper Divisor Sum (Aliquot Sum)
- 141
- 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
- 4032
- Möbius Function
- 1
- Radical
- 4171
- 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
- 126
- 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
- Coordination sequence T3 for Zeolite Code NON.at n=39A008214
- If x and y are terms, so is x*y + 9.at n=25A009350
- Coordination sequence T5 for Zeolite Code VNI.at n=40A009911
- Coordination sequence for MgNi2, Position Mg1.at n=16A009936
- Powers of fourth root of 13 rounded down.at n=13A018081
- Pseudoprimes to base 36.at n=34A020164
- a(n) is the position of square of n-th prime among the powers of primes (A000961).at n=44A024624
- Number of partitions of n into distinct parts >= 2.at n=57A025147
- Numerators of continued fraction convergents to sqrt(353).at n=10A041668
- Denominators of continued fraction convergents to sqrt(929).at n=7A042797
- Numbers having three 1's in base 8.at n=32A043427
- Recip transform of 2*(1 + x^5)-1/(1-x).at n=7A049155
- a(n) = smallest nonnegative integer not the Nim sum of at most 4 earlier terms.at n=41A054016
- Composite numbers k such that sigma(k + 6!) = sigma(k + 720) = sigma(k) + 720.at n=34A054984
- Nearest integer to log(n^n)^log(1 + log(n)).at n=48A062434
- Semiprimes p1*p2 such that p2 > p1 and p2 mod p1 = 11.at n=13A064909
- Numbers n such that n and prime(n) end with the same two digits.at n=41A067838
- Positions of check bits in code in A075934.at n=28A075936
- Numbers given by the Rule 225 Cellular Automaton.at n=41A078176
- Numbers n such that sigma_3(n) is divisible by square of cototient of n, while n is not a prime number.at n=10A091286