2955
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4752
- Proper Divisor Sum (Aliquot Sum)
- 1797
- 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
- 1568
- Möbius Function
- -1
- Radical
- 2955
- 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
- 141
- 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
- P_n'(3), where P_n is n-th Legendre polynomial.at n=4A002695
- Numbers that are the sum of 7 positive 7th powers.at n=14A003374
- Coordination sequence T8 for Zeolite Code EUO.at n=34A008103
- Pseudoprimes to base 19.at n=24A020147
- Triangle of Gaussian binomial coefficients [ n,k ] for q = 14.at n=11A022178
- Triangle of Gaussian binomial coefficients [ n,k ] for q = 14.at n=13A022178
- T(4n,n), where T is the array defined in A025177.at n=4A025186
- T(4n,n), where T is the array in A026148.at n=4A026159
- Numbers k such that k^2 is palindromic in base 14.at n=19A030072
- 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 17.at n=25A031515
- Numbers whose set of base-14 digits is {1,4}.at n=14A032826
- Numbers whose set of base-14 digits is {1,3}.at n=14A032921
- Numbers whose set of base-14 digits is {1,2}.at n=14A032934
- Numbers whose base-14 expansion has no run of digits with length < 2.at n=27A033027
- Numbers whose set of base 14 digits is {0,1}.at n=15A033050
- a(0)=2; a(n) is the smallest k > a(n-1) such that the fractional part of k^(1/9) starts with n.at n=43A034074
- Sums of 5 distinct powers of 3.at n=39A038467
- Denominators of continued fraction convergents to sqrt(454).at n=7A041865
- Numerators of continued fraction convergents to sqrt(856).at n=6A042652
- Numbers k such that the string 4,3 occurs in the base 9 representation of k but not of k-1.at n=40A044290