1252
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 2198
- Proper Divisor Sum (Aliquot Sum)
- 946
- 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
- 624
- Möbius Function
- 0
- Radical
- 626
- 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
- 132
- 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
- yes
- Odd
- no
Appears in sequences
- Number of primes < prime(n)^2.at n=25A000879
- Primes multiplied by 4.at n=64A001749
- a(n) = a(n-1) + a(n-4) with a(0) = 0, a(1) = a(2) = a(3) = 1.at n=25A003269
- Numbers k such that 2*3^k + 1 is prime.at n=21A003306
- Numbers of Twopins positions.at n=17A005688
- Number of points on surface of tetrahedron; coordination sequence for sodalite net (equals 2*n^2+2 for n > 0).at n=25A005893
- Optimal cost of search tree for searching an ordered array of n elements with cost k of probing element k.at n=24A007077
- Coordination sequence T1 for Zeolite Code BPH.at n=27A008055
- Coordination sequence T1 for Zeolite Code ACO, ASV, EDI, and THO.at n=25A008084
- Coordination sequence T2 for Zeolite Code EDI.at n=25A008085
- Coordination sequence T1 for Zeolite Code KFI.at n=27A008123
- Coordination sequence T2 for Zeolite Code THO.at n=25A008239
- Coordination sequence T3 for Zeolite Code THO.at n=25A008240
- For any circular arrangement of 0..n-1, let S be the sum of cubes of every sum of two contiguous numbers; then a(n) is the number of distinct values of S.at n=9A008781
- Carlitz-Riordan q-Catalan numbers for q=3.at n=4A015084
- Number of ordered triples of integers from [ 1..n ] with no global factor.at n=19A015631
- Expansion of (1-x)/(1-x-x^4).at n=28A017898
- Numbers k such that the continued fraction for sqrt(k) has period 34.at n=4A020373
- Number of solutions to c(1)*prime(2)+...+c(n)*prime(n+1) = 1, where c(i) = +-1 for i > 1, c(1) = 1.at n=18A022898
- Convolution of natural numbers with Beatty sequence for the golden mean A000201.at n=15A023541