2550
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
- 6696
- Proper Divisor Sum (Aliquot Sum)
- 4146
- 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
- 640
- Möbius Function
- 0
- Radical
- 510
- 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
- yes
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 84
- 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
- Oblong (or promic, pronic, or heteromecic) numbers: a(n) = n*(n+1).at n=50A002378
- Restricted partitions.at n=16A002574
- a(n) = 2*n*(2*n+1).at n=25A002943
- Successive integers produced by Conway's PRIMEGAME.at n=30A007542
- a(n) = n OR n^2 (applied to binary expansions).at n=49A007745
- Coordination sequence occurring in Zeolite Codes AFG, CAN, LIO, LOS.at n=35A008013
- Expansion of Jacobi theta constant theta_2^6 /(64q^(3/2)).at n=35A008440
- Coordination sequence T3 for Zeolite Code iRON.at n=35A009883
- Coordination sequence T3 for Zeolite Code RTH.at n=35A009895
- a(0) = 1, a(n) = 13*n^2 + 2 for n>0.at n=14A010004
- Aliquot sequence starting at 1134.at n=2A014365
- Coordination sequence T3 for Zeolite Code OSI.at n=33A016432
- a(n) is the concatenation of n and 2n.at n=24A019550
- Convolution of A023532 and (1, p(1), p(2), ...).at n=41A023598
- Numbers with exactly 6 1's in their ternary expansion.at n=19A023697
- a(n) = (-1 + prime(n+1)^2)/4.at n=24A024701
- Number of (s(0),s(1),...,s(n)) such that every s(i) is a nonnegative integer, s(0) = 1, |s(1) - s(0)| = 1, |s(i) - s(i-1)| <= 1 for i >= 2. Also sum of numbers in row n+1 of the array T defined in A026120.at n=8A026135
- Numbers k such that k^2+k+6 is a palindrome.at n=7A027729
- Euler transform of {1, primes}.at n=11A030012
- Numbers having period-4 6-digitized sequences.at n=8A031197