3725
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
- 6
- Divisor Sum
- 4650
- Proper Divisor Sum (Aliquot Sum)
- 925
- 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
- 2960
- Möbius Function
- 0
- Radical
- 745
- 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
- yes
- 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
- 38
- 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
- Number of positive integers <= 2^n of form x^2 + 16*y^2.at n=15A000018
- Numbers that are the sum of 2 squares in exactly 3 ways.at n=39A000443
- Numbers k such that 4!*(2k-5)!/(k!*(k-1)!) is an integer.at n=38A004784
- Coordination sequence T2 for Zeolite Code MEP.at n=36A008158
- Odd pentagonal numbers.at n=25A014632
- Numbers that are the sum of 2 nonzero squares in exactly 3 ways.at n=37A025286
- Numbers that are the sum of 2 distinct nonzero squares in exactly 3 ways.at n=36A025304
- T(2n+1,n+1), T given by A026769.at n=6A026887
- Coordination sequence T1 for Zeolite Code CGS.at n=45A027365
- Nonsquarefree k such that Pell equation x^2 - k*y^2 = -1 is soluble.at n=32A031397
- Partial sums of A000009 (partitions into distinct parts).at n=34A036469
- Number of partitions satisfying cn(1,5) <= cn(0,5) and cn(4,5) <= cn(0,5).at n=37A039862
- Numerators of continued fraction convergents to sqrt(874).at n=7A042688
- Numbers k such that the string 8,8 occurs in the base 9 representation of k but not of k-1.at n=45A044331
- Numbers whose base-5 representation contains exactly three 0's and two 4's.at n=9A045216
- Internal digits of n^2 include digits of n, n does not end in 0.at n=41A046833
- Pentagonal numbers with even index.at n=25A049452
- Numbers k such that 267*2^k-1 is prime.at n=30A050892
- Expansion of ( 1-x ) / ( 1-4*x-x^2+2*x^3 ).at n=6A052990
- Sum of odd composites up to n is palindromic.at n=6A058849