4227
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 5640
- Proper Divisor Sum (Aliquot Sum)
- 1413
- 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
- 2816
- Möbius Function
- 1
- Radical
- 4227
- 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
- 82
- 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
- Numbers that are the sum of 6 positive 6th powers.at n=29A003362
- Sum of the first n primes.at n=46A007504
- Coordination sequence T1 for Zeolite Code APC.at n=45A008032
- Coordination sequence T5 for Zeolite Code MTW.at n=42A008200
- a(0) = 1, a(n) = 25*n^2 + 2 for n > 0.at n=13A010015
- Powers of fifth root of 3 rounded down.at n=38A018120
- Powers of fifth root of 9 rounded down.at n=19A018138
- a(n) = Sum_{k=0..n-1} T(n,k) * T(n,2n-k), with T given by A027082.at n=6A027105
- Product of n with 666 is palindromic.at n=36A030094
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 65.at n=0A031563
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 65.at n=0A031743
- Lucky numbers with size of gaps equal to 20 (upper terms).at n=7A031903
- a(n) = a(n-1)+ a(round(2*(n-1)/3)) +a(round((n-1)/3)) starting a(1)=1.at n=25A033498
- Numbers whose base-4 representation contains exactly four 0's and one 1.at n=34A045034
- Numbers whose base-4 representation contains exactly four 0's and one 3.at n=36A045082
- Lucky numbers that are the sum of the first k primes for some k.at n=4A046286
- Coordination sequence T2 for Zeolite Code DON.at n=44A047954
- Coordination sequence T1 for Zeolite Code MSO.at n=45A047963
- Composite numbers arising as sum of first k primes.at n=39A053790
- Number of (binary) bit strings of length n having an even length block of 0's followed by an odd length block of 1's.at n=10A065506