4505
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5832
- Proper Divisor Sum (Aliquot Sum)
- 1327
- 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
- 3328
- Möbius Function
- -1
- Radical
- 4505
- 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
- 38
- 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
- Numbers that are the sum of 6 positive 7th powers.at n=14A003373
- Related to n-th powers of polynomials: factors complementary to A005730.at n=53A005731
- Numbers k such that the continued fraction for sqrt(k) has period 9.at n=26A010339
- Pseudoprimes to base 52.at n=20A020180
- Pseudoprimes to base 76.at n=47A020204
- Pseudoprimes to base 83.at n=39A020211
- Numbers whose sum of divisors is a cube.at n=26A020477
- Numbers that are the sum of 2 nonzero squares in exactly 4 ways.at n=18A025287
- Numbers that are the sum of 2 nonzero squares in 4 or more ways.at n=18A025295
- Numbers that are the sum of 2 distinct nonzero squares in exactly 4 ways.at n=18A025305
- Numbers that are the sum of 2 distinct nonzero squares in 4 or more ways.at n=18A025314
- Every run of digits of n in base 16 has length 2.at n=23A033014
- Numbers whose base-16 expansion has no run of digits with length < 2.at n=39A033029
- Number of partitions satisfying (cn(0,5) <= cn(1,5) = cn(4,5) and cn(1,5) <= cn(2,5) and cn(1,5) <= cn(3,5)).at n=49A036819
- Sets of 4 consecutive numbers with equal number of divisors.at n=10A039665
- Denominators of continued fraction convergents to sqrt(243).at n=9A041455
- Denominators of continued fraction convergents to sqrt(972).at n=9A042881
- Positive integers having more base-16 runs of even length than odd.at n=24A044842
- Numbers whose base-4 representation contains exactly four 1's and two 2's.at n=19A045107
- Numbers k such that 27*2^k-1 is prime.at n=28A050539