1925
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 2976
- Proper Divisor Sum (Aliquot Sum)
- 1051
- 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
- 1200
- Möbius Function
- 0
- Radical
- 385
- 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
- 50
- 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
- Numbers m such that Fibonacci(m) ends with m.at n=41A000350
- Stirling numbers of the first kind: s(n+2, n).at n=10A000914
- Generalized octagonal numbers: k*(3*k-2), k=0, +- 1, +- 2, +-3, ...at n=50A001082
- Triangular numbers plus quarter-squares: n*(n+1)/2 + floor((n+1)^2/4) (i.e., A000217(n) + A002620(n+1)).at n=50A001859
- Hexagonal pyramidal numbers, or greengrocer's numbers.at n=14A002412
- Expansion of 1/((1-x)^4*(1+x)).at n=26A002623
- The larger of a betrothed pair.at n=2A003503
- Degrees of irreducible representations of alternating group A_12.at n=27A003867
- Degrees of irreducible representations of alternating group A_12.at n=26A003867
- Degrees of irreducible representations of symmetric group S_12.at n=44A003876
- Degrees of irreducible representations of symmetric group S_12.at n=47A003876
- Degrees of irreducible representations of symmetric group S_12.at n=46A003876
- Degrees of irreducible representations of symmetric group S_12.at n=45A003876
- Degrees of irreducible representations of Higman-Sims group HS.at n=20A003908
- Degrees of irreducible representations of Higman-Sims group HS.at n=19A003908
- Betrothed (or quasi-amicable) numbers.at n=7A005276
- Number of walks on square lattice.at n=6A005565
- Coefficient of x^4 in (1-x-x^2)^(-n).at n=10A006504
- 4-dimensional analog of centered polygonal numbers. Also number of regions created by sides and diagonals of a convex n-gon in general position.at n=16A006522
- Worst cases for Pierce expansions (numerators).at n=22A006537