3063
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4088
- Proper Divisor Sum (Aliquot Sum)
- 1025
- 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
- 2040
- Möbius Function
- 1
- Radical
- 3063
- 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
- 61
- 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
- a(1) = a(2) = 1, a(3) = 4; thereafter a(n) = a(n-1) + a(n-3).at n=20A001609
- Coordination sequence T1 for Zeolite Code FER.at n=34A008106
- Coordination sequence T3 for Zeolite Code -WEN.at n=40A009864
- Coordination sequence T4 for Zeolite Code TER.at n=37A016436
- a(n)-th nonsquarefree is sum of first k nonsquarefrees for some k.at n=33A020644
- Sequence A025513 divided by 2.at n=24A025514
- Odd numbers congruent to 7 mod 8 such that (2^(h(-n)+2)-n) is a square, where h(-n) is the class number.at n=44A029724
- Weight distribution of [ 48,17,12 ] dual Rao-Reddy code.at n=8A031136
- Weight distribution of [ 48,17,12 ] dual Rao-Reddy code.at n=16A031136
- Numbers whose base-4 representation has 4 fewer 0's than 3's.at n=27A031469
- 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 36.at n=17A031534
- Numbers k such that 105*2^k+1 is prime.at n=28A032402
- Numbers k such that 179*2^k+1 is prime.at n=18A032466
- Exactly 5 digits from {1,2,3,4,5,6,7,8,9} can precede a(n) to form a prime.at n=27A032695
- Cycle of 2 steps possible for 'concatenate a(n) and nextprime(a(n)) is a prime'.at n=25A034592
- Concatenations C1 and C2 are both prime (see the comment lines).at n=40A034815
- Number of partitions satisfying (cn(2,5) = cn(3,5) = 0 and cn(0,5) <= cn(1,5) and cn(0,5) <= cn(4,5)).at n=50A036823
- Sums of 10 distinct powers of 2.at n=17A038461
- Numbers k such that k-th and (k+1)-st term of A038593 differ by 6.at n=22A038637
- Numbers n such that string 6,3 occurs in the base 10 representation of n but not of n-1.at n=33A044395