612
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 9
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 18
- Divisor Sum
- 1638
- Proper Divisor Sum (Aliquot Sum)
- 1026
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- yes
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 192
- Möbius Function
- 0
- Radical
- 102
- Omega Function (Ω)
- 5
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 38
- 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
- sechshundertzwölf· ordinal: sechshundertzwölfste
- English
- six hundred twelve· ordinal: six hundred twelfth
- Spanish
- seiscientos doce· ordinal: 612º
- French
- six cent douze· ordinal: six cent douzième
- Italian
- seicentododici· ordinal: 612º
- Latin
- sescenti duodecim· ordinal: 612.
- Portuguese
- seiscentos e doze· ordinal: 612º
Appears in sequences
- Number of n-bead necklaces (turning over is allowed) where complements are equivalent.at n=15A000011
- Number of trees with n nodes, 2 of which are labeled.at n=6A000243
- Numbers beginning with letter 's' in English.at n=36A000870
- Number of partitions of n into at most 6 parts.at n=25A001402
- Partial sums of A006206.at n=16A001461
- Numbers k such that 17*2^k - 1 is prime.at n=14A001774
- Numbers y such that p^2 = x^2 + y^2, 0 < x < y, p = A002144(n).at n=52A002365
- Numbers of the form (p^2 - 1)/120 where p is 1 or prime.at n=27A002381
- Smallest number of stones in Tchoukaillon (or Mancala, or Kalahari) solitaire that make use of n-th hole.at n=42A002491
- Beginnings of periodic unitary aliquot sequences.at n=51A003062
- Numbers that are the sum of 7 positive 4th powers.at n=53A003341
- Cubes written backwards.at n=5A004165
- a(n) = n^2 + prime(n).at n=22A004232
- Expansion of (Sum_{n=-inf..inf} x^(n^2))^(-17).at n=2A004418
- Number of nonequivalent dissections of a polygon into n quadrilaterals by nonintersecting diagonals rooted at a cell up to rotation.at n=5A005033
- Number of restricted 3 X 3 matrices with row and column sums n.at n=20A005045
- Untouchable numbers, also called nonaliquot numbers: impossible values for the sum of aliquot parts function (A001065).at n=48A005114
- Record values in A005210.at n=27A005211
- Number of phylogenetic rooted trees with n labels.at n=4A005804
- a(n) = 3*binomial(4*n-1, n-1)/(4*n-1).at n=4A006632