465
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 768
- Proper Divisor Sum (Aliquot Sum)
- 303
- 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
- 240
- Möbius Function
- -1
- Radical
- 465
- Omega Function (Ω)
- 3
- 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
- yes
- 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
- 35
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
Names
- German
- vierhundertfünfundsechzig· ordinal: vierhundertfünfundsechzigste
- English
- four hundred sixty-five· ordinal: four hundred sixty-fifth
- Spanish
- cuatrocientos sesenta y cinco· ordinal: 465º
- French
- quatre cent soixante-cinq· ordinal: quatre cent soixante-cinqième
- Italian
- quattrocentosessantacinque· ordinal: 465º
- Latin
- quadringenti sexaginta quinque· ordinal: 465.
- Portuguese
- quatrocentos e sessenta e cinco· ordinal: 465º
Appears in sequences
- a(n) = n*a(n-1) + (n-3)*a(n-2), with a(1) = 0, a(2) = 1.at n=5A000261
- Padovan sequence (or Padovan numbers): a(n) = a(n-2) + a(n-3) with a(0) = 1, a(1) = a(2) = 0.at n=28A000931
- Number of free nonplanar polyenoids with n nodes.at n=4A000953
- Moran numbers: k such that k/(sum of digits of k) is prime.at n=35A001101
- Number of cells of square lattice of edge 1/n inside quadrant of unit circle centered at 0.at n=24A001182
- Number of clouds with n points; number of undirected 2-regular labeled graphs; or number of n X n symmetric matrices with (0,1) entries, trace 0 and all row sums 2.at n=7A001205
- a(n) = a(n-1) + a(n-2) + 1, with a(0) = a(1) = 1.at n=12A001595
- Related to Zarankiewicz's problem.at n=28A001841
- Expansion of 1/((1-x)^2*(1-x^4)) = 1/( (1+x)*(1+x^2)*(1-x)^3 ).at n=58A001972
- MacMahon's generalized sum of divisors function.at n=13A002127
- Degree of rational Poncelet porism of n-gon.at n=58A002348
- Numbers y such that p^2 = x^2 + y^2, 0 < x < y, p = A002144(n).at n=50A002365
- Odd squarefree numbers with an odd number of prime factors that have no prime factors greater than 31.at n=24A002556
- Number of integral points in a certain sequence of closed quadrilaterals.at n=31A002579
- Dimensions of split simple Lie algebras over any field of characteristic zero.at n=48A003038
- Number of partitions of n into parts 5k+1 or 5k+4.at n=42A003114
- Numbers that are the sum of 10 positive 4th powers.at n=54A003344
- Divisors of 2^20 - 1.at n=19A003529
- Divisors of 2^40 - 1.at n=25A003546
- Degrees of irreducible representations of group L5(2).at n=12A003901