17161
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 3
- Divisor Sum
- 17293
- Proper Divisor Sum (Aliquot Sum)
- 132
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 17030
- Möbius Function
- 0
- Radical
- 131
- Omega Function (Ω)
- 2
- 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
- yes
- 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
- 172
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- no
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- yes
- Achilles Number
- no
- Perfect Power
- yes
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Squares of primes.at n=31A001248
- Expansion of e.g.f. tan(x)/cos(tanh(x)) (odd powers only).at n=4A009758
- Squares of palindromes.at n=22A014186
- a(n) = (F(n+1) + L(n))^2 where F(n) are the Fibonacci numbers (A000045) and L(n) are the Lucas numbers (A000032).at n=9A014717
- Numbers m such that phi(m) * sigma(m) + k^2 is not a square for any k.at n=39A015713
- Numbers n such that tau(sigma(n))= tau(tau(n)).at n=34A015730
- a(n) = (4n + 3)^2.at n=32A016838
- a(n) = (5*n + 1)^2.at n=26A016862
- a(n) = (6*n + 5)^2.at n=21A016970
- a(n) = (7*n + 5)^2.at n=18A017042
- a(n) = (8n + 3)^2.at n=16A017102
- a(n) = (9*n + 5)^2.at n=14A017222
- a(n) = (10*n + 1)^2.at n=13A017282
- a(n) = (11*n + 10)^2.at n=11A017510
- a(n) = (12*n + 11)^2.at n=10A017654
- Strong pseudoprimes to base 58.at n=17A020284
- Numbers whose sum of divisors is prime.at n=16A023194
- Smallest square containing n-th prime as substring.at n=19A029945
- Smallest nontrivial extension of n-th palindrome which is a square.at n=25A030676
- "AFJ" (ordered, size, labeled) transform of 2,1,1,1,...at n=9A032001