3154
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5040
- Proper Divisor Sum (Aliquot Sum)
- 1886
- 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
- 1476
- Möbius Function
- -1
- Radical
- 3154
- 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
- 92
- 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
- yes
- Odd
- no
Appears in sequences
- Generalized tangent numbers d_(n,2).at n=9A000176
- Number of binary forests with n nodes.at n=13A003214
- Coordination sequence T6 for Zeolite Code BOG.at n=40A008054
- Coordination sequence T1 for Zeolite Code RTH.at n=39A009893
- Numbers n such that phi(n + 1) | sigma(n) for n congruent to 1 (mod 3).at n=17A015817
- Powers of cube root of 3 rounded down.at n=22A017982
- Powers of cube root of 3 rounded to nearest integer.at n=22A017983
- Powers of cube root of 9 rounded down.at n=11A018000
- Powers of cube root of 9 rounded to nearest integer.at n=11A018001
- Numbers k such that the continued fraction for sqrt(k) has period 42.at n=32A020381
- Number of 2's in n-th term of A007651.at n=32A022467
- a(n) = Sum_{k=1..n} (n-k) * floor(n/k).at n=32A024920
- A B_2 sequence: a(n) is the least value such that sequence increases and pairwise sums of elements are all distinct.at n=41A025582
- 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 56.at n=2A031554
- Coordination sequence T1 for Zeolite Code SBT.at n=45A033612
- a(n)=(s(n)+2)/8, where s(n)=n-th base 8 palindrome that starts with 6 (in base 8), written in decimal digits.at n=28A043070
- Numbers n such that string 5,4 occurs in the base 10 representation of n but not of n-1.at n=34A044386
- Numbers n such that string 5,4 occurs in the base 10 representation of n but not of n+1.at n=34A044767
- Numbers whose base-5 representation contains exactly three 0's and two 1's.at n=12A045171
- Numbers whose base-5 representation contains exactly three 0's and one 4.at n=31A045215