5291
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6384
- Proper Divisor Sum (Aliquot Sum)
- 1093
- 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
- 4320
- Möbius Function
- -1
- Radical
- 5291
- 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
- 54
- 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
- Orders of cyclotomic polynomials containing a coefficient the absolute value of which is >= 4.at n=41A013592
- Orders of cyclotomic polynomials containing a coefficient the absolute value of which is >= 5.at n=17A013593
- Pseudoprimes to base 38.at n=33A020166
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly five 1's.at n=39A020441
- a(n) = [ a(n-1)/a(1) ] + [ a(n-1)/a(2) ] + ... + [ a(n-1)/a(n-1) ] for n >= 3, with initial terms 2,2.at n=13A022868
- (d(n)-r(n))/2, where d = A008778 and r is the periodic sequence with fundamental period (1,1,0,1).at n=36A026052
- a(n) = T(n,n-3), where T is the array in A026374.at n=20A026382
- a(n) = T(n,n-3), where T is the array in A026386.at n=20A026394
- Divisors of 999999.at n=45A027892
- Positive numbers k such that k*(k+1) is a palindrome.at n=7A028336
- Odd numbers in the (2,3)-Pascal triangle A029600.at n=54A029604
- Odd numbers in the (2,3)-Pascal triangle A029600 that are different from 3.at n=41A029606
- Distinct odd numbers in (2,3)-Pascal triangle A029600.at n=36A029608
- Numbers to the right of the central elements of the (2,3)-Pascal triangle A029600.at n=50A029614
- Numbers to the right of the central elements of the (2,3)-Pascal triangle A029600 that are different from 3.at n=37A029615
- Odd numbers to the right of the central elements of the (2,3)-Pascal triangle A029600.at n=25A029616
- Odd numbers in (3,2)-Pascal triangle A029618.at n=53A029622
- Odd numbers in (3,2)-Pascal triangle A029618 that are different from 3.at n=39A029624
- Distinct odd numbers in (3,2)-Pascal triangle A029618.at n=35A029626
- Numbers to left of central numbers of the (3,2)-Pascal triangle A029618.at n=54A029628