10585
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 13320
- Proper Divisor Sum (Aliquot Sum)
- 2735
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 8064
- Möbius Function
- -1
- Radical
- 10585
- 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
- yes
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- yes
- 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
- 148
- 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
- yes
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Fermat pseudoprimes to base 2, also called Sarrus numbers or Poulet numbers.at n=23A001567
- Carmichael numbers: composite numbers k such that a^(k-1) == 1 (mod k) for every a coprime to k.at n=7A002997
- Pseudoprimes to base 3.at n=23A005935
- Pseudoprimes to base 6.at n=27A005937
- Pseudoprimes to base 7.at n=17A005938
- Euler pseudoprimes: composite numbers n such that 2^((n-1)/2) == +-1 (mod n).at n=15A006970
- Composite numbers k such that k == +-1 (mod 8) and 2^((k-1)/2) == 1 (mod k).at n=11A006971
- a(n) = (2*n+1)*(4*n+1).at n=36A014634
- Pseudoprimes to base 11.at n=29A020139
- Pseudoprimes to base 12.at n=33A020140
- Pseudoprimes to base 13.at n=29A020141
- Pseudoprimes to base 14.at n=32A020142
- Pseudoprimes to base 17.at n=29A020145
- Pseudoprimes to base 18.at n=41A020146
- Pseudoprimes to base 19.at n=44A020147
- Pseudoprimes to base 21.at n=24A020149
- Pseudoprimes to base 24.at n=38A020152
- Pseudoprimes to base 26.at n=45A020154
- Pseudoprimes to base 28.at n=34A020156
- Pseudoprimes to base 31.at n=37A020159