1142
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1716
- Proper Divisor Sum (Aliquot Sum)
- 574
- 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
- 570
- Möbius Function
- 1
- Radical
- 1142
- 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
- 31
- 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
- yes
- Odd
- no
Appears in sequences
- a(n+1) = 1 + a( floor(n/1) ) + a( floor(n/2) ) + ... + a( floor(n/n) ).at n=22A003318
- Number of Hamiltonian cycles in C_4 X P_n.at n=5A003699
- Fibonacci numbers written in base 8.at n=15A004691
- Numbers n such that n^32 + 1 is prime.at n=24A006315
- Number of non-Abelian metacyclic groups of order p^n (p odd).at n=39A007983
- Coordination sequence T1 for Zeolite Code AFS.at n=26A008023
- Coordination sequence T2 for Zeolite Code AFS.at n=26A008024
- Coordination sequence T3 for Zeolite Code EPI.at n=21A008092
- Coordination sequence T1 for Zeolite Code LAU.at n=24A008124
- Coordination sequence T3 for Zeolite Code MTT.at n=21A008191
- Coordination sequence T1 for Zeolite Code SGT.at n=21A008229
- Coordination sequence T2 for Zeolite Code VFI.at n=26A008246
- Expansion of (1+x^10)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=43A008771
- If a, b in sequence, so is a*b+2.at n=43A009299
- Coordination sequence T5 for Zeolite Code VET.at n=20A009906
- Coordination sequence T5 for Zeolite Code VNI.at n=21A009911
- arctanh(exp(x)-sech(x))=x+2/2!*x^2+3/3!*x^3+20/4!*x^4+165/5!*x^5...at n=6A013340
- Composite n such that phi(n) * sigma(n) is one less than a square.at n=20A015709
- Composite and even n such that phi(n) * sigma(n) is one less than a square.at n=12A015721
- Number of integer points (x,y,z) at distance <= 0.5 from sphere of radius n.at n=9A016728