5085
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 8892
- Proper Divisor Sum (Aliquot Sum)
- 3807
- 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
- 2688
- Möbius Function
- 0
- Radical
- 1695
- Omega Function (Ω)
- 4
- 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
- 33
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- 11*n^2 + 11*n + 3.at n=21A006222
- Coordination sequence T1 for Zeolite Code AEL.at n=47A008004
- Coordination sequence T3 for Zeolite Code DAC.at n=45A008069
- Pseudoprimes to base 98.at n=37A020226
- Number of 10's in all partitions of n.at n=38A024794
- Numbers k such that k divides the (left) concatenation of all numbers <= k written in base 13 (most significant digit on right and removing all least significant zeros before concatenation).at n=12A029530
- a(n) = floor(n^3 / e).at n=24A032636
- Numbers in which all pairs of consecutive base-6 digits differ by 2.at n=46A033084
- Numbers whose base-4 representation contains exactly three 1's and three 3's.at n=28A045127
- a(n)=T(n,n+2), array T as in A049723.at n=39A049730
- Fourth spoke of a hexagonal spiral.at n=41A056108
- Numbers n such that n | 10^n + 9^n + 8^n + 7^n + 6^n + 5^n.at n=47A057259
- Numbers k such that k and its reversal are both multiples of 15.at n=12A062905
- Non-palindromic number and its reversal are both multiples of 15.at n=8A062914
- Product of n-th prime number and n-th composite number.at n=29A067563
- Smallest k not a palindrome and not divisible by 10 such that k and R(k) both are divisible by n, or 0 if n is divisible by 10.at n=44A075606
- Leading diagonal of A083173.at n=29A083174
- a(n) = Sum_{i=1..n} A005235(i).at n=38A097589
- Number of totally ramified extensions over Q_3 with degree n in the algebraic closure of Q_3.at n=8A100980
- Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k vertices of outdegree 2 (n >= 0, k >= 0).at n=16A120982