2841
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
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3792
- Proper Divisor Sum (Aliquot Sum)
- 951
- 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
- 1892
- Möbius Function
- 1
- Radical
- 2841
- 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
- 79
- 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
- Coordination sequence T4 for Zeolite Code EUO.at n=33A008099
- Coordination sequence T1 for Zeolite Code MER.at n=39A008160
- Coordination sequence T6 for Zeolite Code NES.at n=34A008210
- Coordination sequence T8 for Zeolite Code PAU.at n=39A008226
- Smallest positive number that can be written as sum of distinct Fibonacci numbers in n ways.at n=44A013583
- Powers of fifth root of 12 rounded up.at n=16A018149
- Numbers k such that the continued fraction for sqrt(k) has period 52.at n=10A020391
- Numbers k such that Fibonacci(k) == -2 (mod k).at n=44A023163
- 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 34.at n=28A031532
- Numbers that, when expressed in base 4 and then interpreted in base 10, yield a multiple of the original number.at n=21A032540
- Coordination sequence T6 for Zeolite Code SFF.at n=35A038432
- Numbers n such that string 0,6 occurs in the base 9 representation of n but not of n-1.at n=37A044257
- Numbers n such that string 4,1 occurs in the base 10 representation of n but not of n-1.at n=31A044373
- Numbers n such that string 0,6 occurs in the base 9 representation of n but not of n+1.at n=37A044638
- Numbers n such that string 4,1 occurs in the base 10 representation of n but not of n+1.at n=31A044754
- Numbers whose base-3 representation contains exactly four 0's and three 2's.at n=32A045012
- Starting positions of strings of 2 3's in the decimal expansion of Pi.at n=20A050222
- Indices of prime Bell numbers A000110.at n=6A051130
- Numbers k such that 2^k - 9 is prime.at n=17A059610
- Integer part of log(n^n)^sqrt(n).at n=8A062455