525
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 992
- Proper Divisor Sum (Aliquot Sum)
- 467
- 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
- 240
- Möbius Function
- 0
- Radical
- 105
- 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
- 30
- Smith 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
Names
- German
- fünfhundertfünfundzwanzig· ordinal: fünfhundertfünfundzwanzigste
- English
- five hundred twenty-five· ordinal: five hundred twenty-fifth
- Spanish
- quinientos veinticinco· ordinal: 525º
- French
- cinq cent vingt-cinq· ordinal: cinq cent vingt-cinqième
- Italian
- cinquecentoventicinque· ordinal: 525º
- Latin
- quingenti viginti quinque· ordinal: 525.
- Portuguese
- quinhentos e vinte e cinco· ordinal: 525º
Appears in sequences
- Number of partitions of n if there are two kinds of 1's and two kinds of 2's.at n=12A000097
- Number of n-node triangulations of sphere in which every node has degree >= 4.at n=9A000103
- a(n) = (n+1)*(2*n)!/(2^n*n!) = (n+1)*(2n-1)!!.at n=4A001193
- Steffensen's bracket function [n,2].at n=5A002051
- Numbers of the form (p^2 - 1)/120 where p is 1 or prime.at n=25A002381
- Hexagonal pyramidal numbers, or greengrocer's numbers.at n=9A002412
- Max_{k=0..n} { Number of partitions of n into exactly k parts }.at n=29A002569
- Expansion of 1/((1-x)^4*(1+x)).at n=16A002623
- a(n) = floor(n(n+2)(2n+1)/8).at n=12A002717
- Self numbers or Colombian numbers (numbers that are not of the form m + sum of digits of m for any m).at n=55A003052
- a(n) = (4*n+1)*(4*n+5).at n=5A003185
- Numbers that are the sum of 10 positive 5th powers.at n=21A003355
- Degrees of irreducible representations of alternating group A_10.at n=22A003865
- Degrees of irreducible representations of symmetric group S_10.at n=38A003874
- Degrees of irreducible representations of symmetric group S_10.at n=37A003874
- a(n) = round(100*log_2(n)).at n=37A004263
- a(n) = ceiling(100*log_2(n)).at n=37A004264
- a(n) = n^2*(n+1)^2*(n+2)/12.at n=5A004302
- Primes written in base 6.at n=44A004680
- Number of achiral 2-connected planar maps with n edges.at n=9A006444