175
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 248
- Proper Divisor Sum (Aliquot Sum)
- 73
- 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
- 120
- Möbius Function
- 0
- Radical
- 35
- Omega Function (Ω)
- 3
- 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
- 80
- Smith 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
Names
- German
- einshundertfünfundsiebzig· ordinal: einshundertfünfundsiebzigste
- English
- one hundred seventy-five· ordinal: one hundred seventy-fifth
- Spanish
- ciento setenta y cinco· ordinal: 175º
- French
- cent soixante-quinze· ordinal: cent soixante-quinzième
- Italian
- centosettantacinque· ordinal: 175º
- Latin
- centum septuaginta quinque· ordinal: 175.
- Portuguese
- cento e setenta e cinco· ordinal: 175º
Appears in sequences
- Local stops on New York City A line subway.at n=20A000054
- -1 + number of partitions of n.at n=15A000065
- Positive zeros of Bessel function of order 0 rounded to nearest integer.at n=55A000134
- Unsigned Stirling numbers of first kind s(n,5).at n=2A000482
- Generalized Stirling numbers of second kind.at n=3A000558
- Number of partitions of n into prime parts.at n=35A000607
- Ramanujan's approximation to population of x^2 + y^2 <= 2^n.at n=9A000691
- a(n) = (2*n)!*(2*n+1)! / (n! * (n+1)!)^2.at n=3A000891
- Stirling numbers of the first kind: s(n+2, n).at n=5A000914
- Numbers m such that Sum_{k=0..m-1} exp(2*Pi*i*k^3/m) != 0.at n=48A001074
- Numbers k such that (k / product of digits of k) is 1 or a prime.at n=14A001103
- 10-gonal (or decagonal) numbers: a(n) = n*(4*n-3).at n=7A001107
- Triangle of Narayana numbers T(n,k) = C(n-1,k-1)*C(n,k-1)/k with 1 <= k <= n, read by rows. Also called the Catalan triangle.at n=24A001263
- Number of ways of making change for n cents using coins of 1, 2, 5, 10, 25 cents.at n=37A001301
- Number of ways of making change for n cents using coins of 1, 2, 5, 10, 25, 50 cents.at n=37A001302
- Number of ways of making change for n cents using coins of 1, 2, 5, 10, 20, 50 cents.at n=36A001313
- Numbers whose digits contain no loops (version 2).at n=53A001742
- a(1)=2, a(2)=3; for n >= 3, a(n) is smallest number that is uniquely of the form a(j) + a(k) with 1 <= j < k < n.at n=39A001857
- Successive denominators of Wallis's approximation to Pi/2 (reduced).at n=6A001902
- Numbers k such that 4*k^2 + 1 is prime.at n=52A001912