912
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 20
- Divisor Sum
- 2480
- Proper Divisor Sum (Aliquot Sum)
- 1568
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 288
- Möbius Function
- 0
- Radical
- 114
- Omega Function (Ω)
- 6
- 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
- yes
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 36
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
Names
- German
- neunhundertzwölf· ordinal: neunhundertzwölfste
- English
- nine hundred twelve· ordinal: nine hundred twelfth
- Spanish
- novecientos doce· ordinal: 912º
- French
- neuf cent douze· ordinal: neuf cent douzième
- Italian
- novecentododici· ordinal: 912º
- Latin
- nongenti duodecim· ordinal: 912.
- Portuguese
- novecentos e doze· ordinal: 912º
Appears in sequences
- Numbers beginning with letter 'n' in English.at n=24A000981
- Smallest k such that the product of q/(q-1) over the primes from prime(n) to prime(n+k-1) is greater than 2.at n=21A001276
- Pentanacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4) + a(n-5), a(0)=a(1)=a(2)=a(3)=0, a(4)=1.at n=15A001591
- Number of n-colored connected graphs on n labeled nodes.at n=4A002032
- Numerators of continued fraction convergents to fifth root of 5.at n=8A002364
- a(n) = a(n-1) + a(n-2) - a(n-3).at n=35A002798
- Theta series of D_4 lattice; Fourier coefficients of Eisenstein series E_{gamma,2}.at n=37A004011
- a(n) = floor(n*phi^9), where phi is the golden ratio, A001622.at n=12A004924
- a(n) = round(n*phi^9), where phi is the golden ratio, A001622.at n=12A004944
- a(n) = n*(5*n+1)/2.at n=19A005475
- Coefficients of elliptic function cn.at n=1A006089
- Cald's sequence: a(n+1) = a(n) - prime(n) if that value is positive and new, otherwise a(n) + prime(n) if new, otherwise 0; start with a(1)=1.at n=90A006509
- a(n) = Sum_{k=1..n-1} (k OR n-k).at n=30A006583
- Numbers k such that k*4^k + 1 is prime.at n=7A007646
- Coordination sequence T2 for Zeolite Code APD.at n=20A008035
- Coordination sequence T3 for Zeolite Code LIO.at n=21A008131
- Coordination sequence T1 for Zeolite Code LTN.at n=21A008140
- Coordination sequence T3 for Zeolite Code SGT.at n=19A008231
- Coordination sequence T2 for Coesite.at n=16A008268
- Coordination sequence for 6-dimensional cubic lattice.at n=4A008414