2570
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
- 8
- Divisor Sum
- 4644
- Proper Divisor Sum (Aliquot Sum)
- 2074
- 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
- 1024
- Möbius Function
- -1
- Radical
- 2570
- 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
- 27
- 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 chessboard polyominoes with n squares.at n=8A001933
- Expansion of chi(x)^10 / phi(x)^4 in powers of x where phi(), chi() are Ramanujan theta functions.at n=13A002512
- Expansion of x*(1+x-x^2)/((1-x)^4*(1+x)).at n=29A005744
- Number of blobs with 2n+1 edges.at n=7A007166
- Coordination sequence for A_4 lattice.at n=6A008383
- Expansion of (1+x^11)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=57A008772
- Coordination sequence T3 for Zeolite Code -ROG.at n=38A009861
- Numbers k such that the continued fraction for sqrt(k) has period 9.at n=21A010339
- Powers of cube root of 19 rounded down.at n=8A018030
- Powers of cube root of 19 rounded to nearest integer.at n=8A018031
- Numbers k such that Fibonacci(k) == -55 (mod k).at n=42A023170
- s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (F(2), F(3), F(4), ...), t = A001950 (upper Wythoff sequence).at n=15A025108
- Expansion of 1/((1-2x)(1-3x)(1-5x)(1-9x)).at n=3A025933
- Numbers k such that 169*2^k+1 is prime.at n=14A032461
- Every run of digits of n in base 4 has length 2.at n=22A033002
- Sum of squares of unitary divisors of n.at n=47A034676
- Number of partitions of n with equal nonzero number of parts congruent to each of 2 and 3 (mod 5).at n=37A035569
- Growth function (or coordination sequence) of the infinite cubic graph corresponding to the srs net (a(n) = number of nodes at distance n from a fixed node).at n=44A038620
- Number of partitions satisfying cn(1,5) + cn(4,5) <= cn(0,5) + cn(2,5) and cn(1,5) + cn(4,5) <= cn(0,5) + cn(3,5).at n=33A039864
- Denominators of continued fraction convergents to sqrt(861).at n=7A042663