12025
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 16492
- Proper Divisor Sum (Aliquot Sum)
- 4467
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 8640
- Möbius Function
- 0
- Radical
- 2405
- 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
- 42
- 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
- Pseudoprimes to base 7.at n=21A005938
- a(n) = (n+1)*(2*n+1)*(3*n+1).at n=12A011199
- Pseudoprimes to base 24.at n=40A020152
- Pseudoprimes to base 51.at n=37A020179
- Strong pseudoprimes to base 18.at n=14A020244
- Strong pseudoprimes to base 32.at n=20A020258
- Strong pseudoprimes to base 57.at n=11A020283
- Strong pseudoprimes to base 93.at n=18A020319
- Numbers that are the sum of 2 nonzero squares in exactly 6 ways.at n=3A025289
- Numbers that are the sum of 2 nonzero squares in 5 or more ways.at n=6A025296
- Numbers that are the sum of 2 nonzero squares in 6 or more ways.at n=3A025297
- Numbers that are the sum of 2 distinct nonzero squares in exactly 6 ways.at n=3A025307
- Numbers that are the sum of 2 distinct nonzero squares in 5 or more ways.at n=5A025315
- Numbers that are the sum of 2 distinct nonzero squares in 6 or more ways.at n=3A025316
- Quotient of 'base-2' division described in A032533.at n=13A032534
- 20-gonal (or icosagonal) numbers: a(n) = n*(9*n-8).at n=37A051872
- Number of trees with n nodes and 5 leaves.at n=17A055292
- a(n) = A077702(n+1)/A077702(n).at n=19A077703
- Numbers n such that n is not the power of a prime and such that for every prime divisor p of n, p-1 divides n-1.at n=35A087442
- 3^(n-1)(n+3)/2-(n-1)/2.at n=8A087448