1650
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
- 24
- Divisor Sum
- 4464
- Proper Divisor Sum (Aliquot Sum)
- 2814
- 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
- 400
- Möbius Function
- 0
- Radical
- 330
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- 135
- Smith Number
- no
- Vampire 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
Appears in sequences
- Expansion of x^3*(5-2*x)*(1-x^3)/(1-x)^4.at n=18A000338
- Number of connected partially ordered sets with n unlabeled elements.at n=7A000608
- a(n) is the solution to the postage stamp problem with 4 denominations and n stamps.at n=15A001209
- Numbers that are the sum of 5 positive 6th powers.at n=14A003361
- Degrees of irreducible representations of alternating group A_12.at n=24A003867
- Degrees of irreducible representations of symmetric group S_12.at n=41A003876
- Degrees of irreducible representations of symmetric group S_12.at n=40A003876
- Sums of distinct nonzero 4th powers.at n=46A003999
- a(n) = Fibonacci(n+1) + prime(n).at n=15A004398
- Numbers that are the sum of at most 5 nonzero 6th powers.at n=45A004856
- Second pentagonal numbers: a(n) = n*(3*n + 1)/2.at n=33A005449
- Number of exterior points formed by extending diagonals of n-gon in general position.at n=9A005701
- Number of planted identity matched trees with n nodes.at n=7A005754
- Numbers not of form p + 2^x + 2^y.at n=35A006286
- a(n) = Sum_{k=1..n-1} k XOR n-k.at n=45A006582
- Parenthesized one way gives the powers of 2: (1), (2), (1+3), ..., another way the powers of 3: (1), (2+1), (3+6), ....at n=20A006895
- Number of partitions of n in which no part occurs just once.at n=40A007690
- Coordination sequence T3 for Zeolite Code AET.at n=28A008009
- Coordination sequence T2 for Zeolite Code AWW.at n=29A008046
- Coordination sequence T5 for Zeolite Code MFS.at n=25A008177