4141
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4284
- Proper Divisor Sum (Aliquot Sum)
- 143
- 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
- 4000
- Möbius Function
- 1
- Radical
- 4141
- 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
- Heptagonal numbers (or 7-gonal numbers): n*(5*n-3)/2.at n=41A000566
- Deceptive nonprimes: composite numbers k that divide the repunit R_{k-1}.at n=9A000864
- Centered square numbers: a(n) = 2*n*(n+1)+1. Sums of two consecutive squares. Also, consider all Pythagorean triples (X, Y, Z=Y+1) ordered by increasing Z; then sequence gives Z values.at n=45A001844
- Spiral sieve using Fibonacci numbers.at n=17A005626
- Pseudoprimes to base 10.at n=18A005939
- Coordination sequence T1 for Zeolite Code MEP.at n=38A008157
- Odd heptagonal numbers (A000566).at n=20A014637
- Expansion of 1/((1-3*x)*(1-7*x)).at n=4A016138
- Pseudoprimes to base 32.at n=43A020160
- Pseudoprimes to base 36.at n=33A020164
- Pseudoprimes to base 39.at n=13A020167
- Pseudoprimes to base 57.at n=33A020185
- Pseudoprimes to base 62.at n=32A020190
- Pseudoprimes to base 84.at n=15A020212
- Pseudoprimes to base 87.at n=29A020215
- Pseudoprimes to base 91.at n=35A020219
- Pseudoprimes to base 100.at n=28A020228
- Strong pseudoprimes to base 32.at n=14A020258
- Strong pseudoprimes to base 39.at n=5A020265
- Strong pseudoprimes to base 62.at n=13A020288