9375
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 24
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 15624
- Proper Divisor Sum (Aliquot Sum)
- 6249
- 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
- 5000
- Möbius Function
- 0
- Radical
- 15
- Omega Function (Ω)
- 6
- 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
- 47
- 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
- yes
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Numbers that are the sum of 3 positive 5th powers.at n=43A003348
- Numbers of the form 3^i*5^j with i, j >= 0.at n=30A003593
- Expansion of g.f. (1 - 2*x)/(1 - 5*x).at n=6A005053
- Smallest label f(T) given to a rooted tree T with n nodes in Matula-Goebel labeling.at n=17A005517
- Least number which is side of n Pythagorean triples.at n=20A006593
- Triangle of coefficients in expansion of (1+5x)^n.at n=25A013612
- Triangle of coefficients in expansion of (3+5x)^n.at n=19A013622
- Numbers k that divide s(k), where s(1)=1, s(j)=21*s(j-1)+j.at n=29A014872
- Least k>1 such that first n terms of Kolakoski sequence A000002 repeat in reverse order beginning at k-th term.at n=47A022295
- a(n) = b(n) + d(n), where b(n) = (n-th Lucas number) and d(n) = (n-th non-Fibonacci number).at n=18A023484
- Numbers k that divide the (right) concatenation of all numbers <= k written in base 5 (most significant digit on left).at n=18A029450
- 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 31.at n=37A031529
- Numbers that, when expressed in base 5 and then interpreted in base 10, yield a multiple of the original number.at n=45A032543
- Trimorphic numbers: n^3 ends with n. Also m-morphic numbers for all m > 5 such that m-1 is not divisible by 10 and m == 3 (mod 4).at n=34A033819
- Numbers whose prime factors are 3 and 5.at n=16A033849
- Composite numbers whose prime factors contain no digits other than 3 and 5.at n=45A036315
- Triangle whose (i,j)-th entry is 5^(i-j)*binomial(i,j).at n=23A038243
- Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*3^j.at n=16A038245
- Odd numbers divisible by exactly 6 primes (counted with multiplicity).at n=29A046319
- Composites c whose decimal expansion ends with its largest prime factor.at n=27A050693