1250
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 10
- Divisor Sum
- 2343
- Proper Divisor Sum (Aliquot Sum)
- 1093
- 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
- 500
- Möbius Function
- 0
- Radical
- 10
- Omega Function (Ω)
- 5
- 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
- 26
- 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
- yes
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Numbers that are the sum of 2 squares in exactly 3 ways.at n=9A000443
- a(n) = ceiling(n^2/2).at n=50A000982
- a(n) = 2*n^2.at n=25A001105
- Numbers that are the sum of 2 positive 4th powers.at n=14A003336
- Numbers that are the sum of 9 positive 5th powers.at n=49A003354
- Numbers of the form 2^i*5^j with i, j >= 0.at n=30A003592
- Numbers that are the sum of at most 2 nonzero 4th powers.at n=20A004831
- Number of paraffins.at n=17A005999
- a(n) = floor(n^2/2).at n=50A007590
- Some permutation of digits is a cube.at n=47A007939
- Noncubes such that some permutation of digits is a cube.at n=37A007940
- Coordination sequence T1 for Zeolite Code MFS.at n=22A008173
- Coordination sequence T7 for Zeolite Code MFS.at n=22A008179
- Coordination sequence T1 for Zeolite Code CON.at n=25A009868
- Coordination sequence T6 for Zeolite Code CON.at n=25A009873
- Triangle of coefficients in expansion of (1+5x)^n.at n=18A013612
- Numbers k that divide s(k), where s(1)=1, s(j)=6*s(j-1)+j.at n=40A014853
- Positive integers n such that n | (2^n + n/2 + 1).at n=5A015945
- Numbers k such that k | 3^k + 1.at n=5A015949
- Numbers k such that k | 7^k + 1.at n=5A015954