7058
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
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 10590
- Proper Divisor Sum (Aliquot Sum)
- 3532
- 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
- 3528
- Möbius Function
- 1
- Radical
- 7058
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
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
- 57
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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 points on surface of octahedron; also coordination sequence for cubic lattice: a(0) = 1; for n > 0, a(n) = 4n^2 + 2.at n=42A005899
- a(0) = 1, a(n) = 9*n^2 + 2 for n>0.at n=28A010002
- Coordination sequence for C_3 lattice: a(n) = 16*n^2 + 2 (n>0), a(0)=1.at n=21A010006
- Numbers whose least quadratic nonresidue (A020649) is 13.at n=18A025025
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 84.at n=0A031582
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 84.at n=1A031762
- Number of partitions satisfying (cn(0,5) <= cn(2,5) and cn(0,5) <= cn(3,5) and cn(0,5) <= cn(1,5) and cn(0,5) <= cn(4,5)).at n=34A036801
- Numerators of continued fraction convergents to sqrt(622).at n=7A042194
- a(n) = a(n-1) + a(m) for n >= 4, where m = 2^(p+1) + 2 - n and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = 1 and a(3) = 4.at n=45A050037
- Numbers k such that the simple continued fraction for (1+1/k)^k contains k.at n=47A071527
- Self-convolution of A086582; the first 2^n terms of this sequence gives the 2^n terms that follow the 2^n-th term of A086582.at n=37A086583
- a(n) = n_{n^2}.at n=41A122625
- First number in smaller of two distinct sets of n consecutive numbers with identical corresponding prime signatures.at n=12A208893
- First number in smaller of two distinct sets of n consecutive numbers with identical corresponding prime signatures.at n=13A208893
- Rising diagonal sums of triangle of Fibonacci polynomials (rows displayed as centered text).at n=18A227300
- Number of partitions of n such that the multiplicity of the number of parts is a part.at n=44A240499
- First differences of A065094 and also arithmetic means of initial terms of A065094.at n=47A241772
- a(n) = 3*n^2 - 3*n + 2.at n=49A242658
- Number of unlabeled rooted trees with n nodes such that the minimal outdegree of inner nodes equals 8.at n=42A244462
- Numbers missing from A001032 despite satisfying the necessary congruence conditions (see comments).at n=12A274469