5925
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 9920
- Proper Divisor Sum (Aliquot Sum)
- 3995
- 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
- 3120
- Möbius Function
- 0
- Radical
- 1185
- Omega Function (Ω)
- 4
- 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
- 36
- 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
- no
- Odd
- yes
Appears in sequences
- Expansion of 1/(1-x^6-x^7-x^8-x^9-x^10-x^11-x^12-x^13-x^14-x^15).at n=45A017855
- a(n) = n*(19*n - 1)/2.at n=25A022276
- Numbers that, when expressed in base 5 and then interpreted in base 10, yield a multiple of the original number.at n=40A032543
- Numbers whose set of base-14 digits is {2,3}.at n=17A032814
- Every run of digits of n in base 14 has length 2.at n=28A033012
- Positive integers having more base-14 runs of even length than odd.at n=30A044840
- Nearest integer to log(n)^sqrt(n).at n=42A062464
- Expansion of Product_{k>=1} (1+x^k)^A001055(k).at n=34A066806
- 2-apexes of omega: numbers k such that omega(k-2) < omega(k-1) < omega(k) > omega(k+1) > omega(k+2), where omega(m) = the number of distinct prime factors of m.at n=29A076762
- a(n) = (2*n+5)*(2*n+1).at n=37A078371
- Arithmetic derivative of (prime(n)+1)*(prime(n+1)+1)/4.at n=31A079094
- a(n) = (4*n+3)*(4*n+7).at n=18A085027
- a(n) = n^2*(n+1)^2*(4*n^2 - 5*n + 4)/12.at n=5A101381
- Number of partitions of n into parts that are primes or squares of primes.at n=54A111901
- Numbers k such that the k-th triangular number contains only digits {1,5,7}.at n=9A119135
- First trisection of A061037 (Balmer line series of the hydrogen atom).at n=25A142590
- a(n) = (8*n+3)*(8*n+7).at n=9A146301
- Number of permutations of 5 indistinguishable copies of 1..n with exactly 2 adjacent element pairs in decreasing order.at n=2A151647
- Triangle of coefficients of polynomials defined by Binet form: P(n,x) = ((x+d)^n + (x-d)^n)/2, where d=sqrt(x+4).at n=59A162516
- Quintisection A061037(5*n+2).at n=15A165248