4852
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 8498
- Proper Divisor Sum (Aliquot Sum)
- 3646
- 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
- 2424
- Möbius Function
- 0
- Radical
- 2426
- Omega Function (Ω)
- 3
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 46
- 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
- yes
- Odd
- no
Appears in sequences
- Number of alkyls Y^{II} C_n H_{2n+2} with n carbon atoms.at n=11A000646
- Fibonacci numbers written backwards.at n=18A004091
- Reversals of Fibonacci numbers (sorted).at n=18A004170
- Number of sensed genus 1 maps with n edges.at n=4A006386
- Coordination sequence T8 for Zeolite Code MFS.at n=43A008180
- Coordination sequence T6 for Zeolite Code MTW.at n=46A008201
- Least m such that if r and s in {1/1, 1/4, 1/9,..., 1/n^2} satisfy r < s, then r < k/m < s for some integer k.at n=23A024827
- Number of partitions in parts not of the form 11k, 11k+1 or 11k-1. Also number of partitions with no part of size 1 and differences between parts at distance 4 are greater than 1.at n=41A035944
- Number of partitions of n into parts not of the form 13k, 13k+4 or 13k-4. Also number of partitions with at most 3 parts of size 1 and differences between parts at distance 5 are greater than 1.at n=33A035952
- Number of ordered rooted trees with n non-root nodes and all outdegrees <= seven.at n=9A036769
- Coordination sequence T11 for Zeolite Code STT.at n=46A038429
- Denominators of continued fraction convergents to sqrt(517).at n=8A041989
- a(n)=T(2n-1,n), array T given by A048212.at n=36A048221
- a(n)=a(n-1)+a(m), where m=2n-2-2^(p+1) and 2^p<n-1<=2^(p+1), for n >= 4.at n=28A050059
- Numbers n such that 77*2^n-1 is prime.at n=14A050564
- Triangle read by rows: For n >= 0, k >= 0, T(n,k) is the number of permutations pi of n such that the total distance Sum_i abs(i-pi(i)) = 2k. Equivalently, k = Sum_i max(i-pi(i),0).at n=51A062869
- Integers n > 196 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 196.at n=41A063049
- Centered 21-gonal numbers.at n=21A069178
- a(n) = (9*n^2 - 3*n + 2)/2.at n=33A080855
- a(n) is the number of cubes with at most n digits and first digit 1.at n=12A083380