2750
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 5616
- Proper Divisor Sum (Aliquot Sum)
- 2866
- 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
- 1000
- Möbius Function
- 0
- Radical
- 110
- Omega Function (Ω)
- 5
- 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
- 40
- 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
- a(n) = (7*n+1)*(7*n+6).at n=7A001526
- Degrees of irreducible representations of Higman-Sims group HS.at n=22A003908
- a(n) = least integer m > a(n-1) such that m - a(n-1) != a(j) - a(k) for all j, k less than n; a(1) = 1, a(2) = 2.at n=49A004978
- Coordination sequence T6 for Zeolite Code BOG.at n=37A008054
- Coordination sequence T5 for Zeolite Code HEU.at n=34A008120
- Coordination sequence T3 for Zeolite Code STI.at n=36A008236
- a(n) = n OR n^3 (applied to binary expansions).at n=13A008468
- Positive numbers k such that k and 2*k are anagrams in base 8 (written in base 8).at n=10A023073
- Convolution of natural numbers with Beatty sequence for the golden mean A000201.at n=20A023541
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (natural numbers), t = A000201 (lower Wythoff sequence).at n=25A024863
- a(n) = n*(n+5).at n=50A028557
- Numbers k such that A174141(k) is divisible by k.at n=27A032581
- a(n)=number of Gaussian integers z=a+bi satisfying |z|<=n+1/2, b>=0.at n=41A036707
- Matrix 5th power of partition triangle A008284.at n=47A039807
- Numbers k such that the string 8,5 occurs in the base 9 representation of k but not of k-1.at n=36A044328
- Numbers n such that string 5,0 occurs in the base 10 representation of n but not of n-1.at n=30A044382
- Numbers n such that string 7,5 occurs in the base 10 representation of n but not of n-1.at n=29A044407
- Numbers n such that string 8,5 occurs in the base 9 representation of n but not of n+1.at n=36A044709
- Numbers n such that string 5,0 occurs in the base 10 representation of n but not of n+1.at n=30A044763
- Numbers having, in base 14, (sum of even run lengths)=(sum of odd run lengths).at n=5A044885