1375
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 1872
- Proper Divisor Sum (Aliquot Sum)
- 497
- 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
- 1000
- Möbius Function
- 0
- Radical
- 55
- 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
- 39
- 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/((1-2x)(1+x^2)(1-x-2x^3)).at n=9A003477
- Numbers of the form 5^i * 11^j.at n=11A003598
- Numerators of Cauchy numbers of first type.at n=7A006232
- a(n) = n*(n + 1)*(n^2 - 3*n + 5)/6.at n=10A006484
- 10-gonal (or decagonal) pyramidal numbers: a(n) = n*(n + 1)*(8*n - 5)/6.at n=10A007585
- Coordination sequence T1 for Zeolite Code AST.at n=27A008036
- Expansion of (1+x^8)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=45A008769
- Coordination sequence T2 for Zeolite Code AHT.at n=25A009867
- Coordination sequence T4 for Zeolite Code CON.at n=26A009871
- Coordination sequence T6 for Zeolite Code VNI.at n=23A009912
- Coordination sequence T1 for Zeolite Code ZON.at n=26A009919
- a(n) = (1/12)*(n+5)*(n+1)*n^2.at n=10A014205
- Numbers k that divide s(k), where s(1)=1, s(j)=11*s(j-1)+j.at n=8A014858
- a(n) = 11*a(n-1) + 2*a(n-2).at n=4A015593
- First occurrence of exactly n identical terms in A007448.at n=32A016046
- Coordination sequence T4 for Zeolite Code TER.at n=25A016436
- Expansion of 1/(1-x^10-x^11-x^12-x^13-x^14-x^15-x^16-x^17-x^18-x^19).at n=59A017895
- Powers of sqrt(18) rounded to nearest integer.at n=5A017959
- Powers of sqrt(18) rounded up.at n=5A017960
- Powers of fourth root of 18 rounded to nearest integer.at n=10A018097