1592
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 3000
- Proper Divisor Sum (Aliquot Sum)
- 1408
- 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
- 792
- Möbius Function
- 0
- Radical
- 398
- Omega Function (Ω)
- 4
- 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
- 122
- 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
- Number of nonisomorphic connected functions with no fixed points, or proper rings with n edges.at n=9A002862
- Number of n-node trees with a forbidden limb of length 3.at n=14A002989
- Numbers that are the sum of 10 positive 6th powers.at n=23A003366
- a(n) = floor(n*phi^11), where phi is the golden ratio, A001622.at n=8A004926
- a(n) = round(n*phi^11), where phi is the golden ratio, A001622.at n=8A004946
- Number of unsensed planar maps with n edges and without faces of degree 1.at n=7A006389
- Coordination sequence T3 for Zeolite Code DDR.at n=25A008073
- Coordination sequence T1 for Zeolite Code NON.at n=24A008212
- Expansion of (1+x^5)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=46A008766
- If a, b in sequence, so is ab+8.at n=12A009331
- Numbers k such that phi(k) + 9 | sigma(k + 9).at n=20A015788
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite TON = Theta-1 Nan[AlnSi24-nO48] starting with a T4 atom.at n=10A019246
- Expansion of 1/((1-x)(1-2x)(1-6x)(1-7x)).at n=3A021174
- Index of 3^n within sequence of numbers of form 2^i*3^j (A003586).at n=44A022330
- Place where n-th 1 occurs in A023117.at n=37A022779
- Place where n-th 1 occurs in A023119.at n=34A022781
- Numbers k such that Fib(k) == 21 (mod k).at n=14A023179
- Numbers that are the sum of 4 nonzero squares in exactly 10 ways.at n=33A025366
- Numbers that are the sum of 4 distinct nonzero squares in exactly 10 ways.at n=43A025385
- Index of 7^n within the sequence of the numbers of the form 2^i*7^j.at n=33A025720