1298
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 2160
- Proper Divisor Sum (Aliquot Sum)
- 862
- 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
- 580
- Möbius Function
- -1
- Radical
- 1298
- 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
- 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
- 145
- Smith Number
- no
- Vampire 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
- yes
- Odd
- no
Appears in sequences
- Number of partitions of n into prime parts.at n=55A000607
- Numbers which are the sum of 3 nonzero 4th powers.at n=32A003337
- Numbers k such that 8*3^k - 1 is prime.at n=12A005541
- Number of points on surface of octahedron; also coordination sequence for cubic lattice: a(0) = 1; for n > 0, a(n) = 4n^2 + 2.at n=18A005899
- a(n) = 3*a(n-1) + a(n-2) with a(0) = 2, a(1) = 3.at n=6A006497
- Related to self-avoiding walks on square lattice.at n=5A006816
- Inverse Moebius transform of triangular numbers.at n=41A007437
- Coordination sequence T2 for Zeolite Code ATV.at n=23A008044
- Coordination sequence T2 for Zeolite Code NES.at n=23A008206
- Coordination sequence T3 for Zeolite Code -WEN.at n=26A009864
- Coordination sequence T3 for Zeolite Code iRON.at n=25A009883
- a(0) = 1, a(n) = n^2 + 2 for n > 0.at n=36A010000
- a(0) = 1, a(n) = 9*n^2 + 2 for n>0.at n=12A010002
- Coordination sequence for C_3 lattice: a(n) = 16*n^2 + 2 (n>0), a(0)=1.at n=9A010006
- Apply partial sum operator 4 times to binary rooted tree numbers.at n=8A014171
- Numbers k such that phi(k) | sigma_14(k).at n=12A015773
- Expansion of 1/(1 - x^12 - x^13 - ...).at n=63A017906
- Least k such that A020951(k) = n.at n=32A020953
- a(n) = a(n-1) + c(n-1) for n >= 2, a( ) increasing, given a(1)=5; where c( ) is complement of a( ).at n=45A022937
- Convolution of A000201 with itself.at n=13A023663