2562
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 5952
- Proper Divisor Sum (Aliquot Sum)
- 3390
- 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
- 720
- Möbius Function
- 1
- Radical
- 2562
- Omega Function (Ω)
- 4
- 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
- 53
- 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
- a(n) = sigma_2(n): sum of squares of divisors of n.at n=43A001157
- a(n) is the number of partitions of 5n that can be obtained by adding together five (not necessarily distinct) partitions of n.at n=6A002222
- Sum of 12 nonzero 8th powers.at n=10A003390
- Numbers that are the sum of 7 positive 9th powers.at n=5A003396
- Numbers that are the sum of at most 7 positive 9th powers.at n=32A004891
- Numbers that are the sum of at most 8 positive 9th powers.at n=37A004892
- Numbers that are the sum of at most 9 positive 9th powers.at n=42A004893
- Number of points on surface of cuboctahedron (or icosahedron): a(0) = 1; for n > 0, a(n) = 10n^2 + 2. Also coordination sequence for f.c.c. or A_3 or D_3 lattice.at n=16A005901
- Trails of length n on honeycomb lattice.at n=11A006851
- Coordination sequence T2 for Zeolite Code BIK.at n=30A008048
- Coordination sequence T3 for Zeolite Code LAU.at n=36A008126
- Coordination sequence T1 for Zeolite Code LTA and RHO.at n=40A008137
- Coordination sequence T5 for Zeolite Code MTT.at n=31A008193
- Coordination sequence T1 for Zeolite Code PAU.at n=37A008219
- Coordination sequence for diamond.at n=32A008253
- Coordination sequence for A_6 lattice.at n=3A008387
- Coordination sequence for CaF2(2), Ca position.at n=32A009926
- Coordination sequence for MgCu2, Cu position.at n=13A009930
- a(0) = 1, a(n) = 40*n^2 + 2 for n>0.at n=8A010022
- (n-th Fibonacci number that is not 1) - (n-th number that is 1 or not a Fibonacci number).at n=15A014242