1895
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2280
- Proper Divisor Sum (Aliquot Sum)
- 385
- 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
- 1512
- Möbius Function
- 1
- Radical
- 1895
- 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
- 174
- 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
- no
- Odd
- yes
Appears in sequences
- Expansion of 1/((1-x)^2*(1-x^2)*(1-x^5)).at n=44A001304
- Oscillates under partition transform.at n=42A007212
- Coordination sequence T1 for Zeolite Code AFR.at n=33A008019
- Coordination sequence T4 for Zeolite Code AFR.at n=33A008022
- Coordination sequence T2 for Zeolite Code AWW.at n=31A008046
- Coordination sequence T5 for Zeolite Code -CLO.at n=39A009854
- Expansion of e.g.f. -log(cos(x) - log(x+1)).at n=7A013467
- Base 6 expansion uses each positive digit just once.at n=2A023744
- A B_2 sequence: a(n) is the least value such that sequence increases and pairwise sums of elements are all distinct.at n=34A025582
- a(n) = sum of the numbers between the two n's in A026280.at n=39A026283
- Sequence satisfies T^2(a)=a, where T is defined below.at n=42A027595
- a(n) = n^2 + n + 3.at n=43A027688
- 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 16.at n=43A031514
- Numbers k such that 125*2^k+1 is prime.at n=16A032412
- Numbers with the property that all pairs of consecutive base-3 digits differ by 1.at n=48A033068
- Coordination sequence T4 for Zeolite Code SBE.at n=35A033607
- Multiplicity of highest weight (or singular) vectors associated with character chi_190 of Monster module.at n=37A034578
- Divide primes into groups with prime(n) elements and add together.at n=5A034958
- Sequence arising in search for Legendre sequences.at n=13A039792
- Numbers k such that 5 and 9 occur juxtaposed in the base-10 representation of k but not of k-1.at n=37A043254