925
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 1178
- Proper Divisor Sum (Aliquot Sum)
- 253
- 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
- 720
- Möbius Function
- 0
- Radical
- 185
- 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
- 129
- 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
- neunhundertfünfundzwanzig· ordinal: neunhundertfünfundzwanzigste
- English
- nine hundred twenty-five· ordinal: nine hundred twenty-fifth
- Spanish
- novecientos veinticinco· ordinal: 925º
- French
- neuf cent vingt-cinq· ordinal: neuf cent vingt-cinqième
- Italian
- novecentoventicinque· ordinal: 925º
- Latin
- nongenti viginti quinque· ordinal: 925.
- Portuguese
- novecentos e vinte e cinco· ordinal: 925º
Appears in sequences
- Pentagonal numbers: a(n) = n*(3*n-1)/2.at n=25A000326
- Numbers that are the sum of 2 squares in exactly 3 ways.at n=7A000443
- Number of points of norm <= n in cubic lattice.at n=6A000605
- Expansion of g.f. (1 + x + 2*x^2)/((1 - x)^2*(1 - x^3)).at n=36A000969
- Numbers beginning with letter 'n' in English.at n=37A000981
- a(n) = ceiling(n^2/2).at n=43A000982
- Generalized pentagonal numbers: m*(3*m - 1)/2, m = 0, +-1, +-2, +-3, ....at n=49A001318
- Centered square numbers: a(n) = 2*n*(n+1)+1. Sums of two consecutive squares. Also, consider all Pythagorean triples (X, Y, Z=Y+1) ordered by increasing Z; then sequence gives Z values.at n=21A001844
- a(n) = n^2 written backwards.at n=22A002942
- Numbers that are the sum of 8 positive 6th powers.at n=12A003364
- Expansion of x*(1+x-x^2)/((1-x)^4*(1+x)).at n=20A005744
- Number of inequivalent ways to color vertices of a regular tetrahedron using <= n colors.at n=10A006008
- Number of partitions of n in which no part occurs just once.at n=37A007690
- Coordination sequence T1 for Zeolite Code AEI.at n=23A008001
- Coordination sequence T2 for Zeolite Code BRE.at n=20A008059
- Coordination sequence T4 for Zeolite Code EMT.at n=25A008089
- Multiples of 25.at n=37A008607
- Numbers n such that n^2 and n have same last 2 digits.at n=38A008852
- Numbers k such that the continued fraction for sqrt(k) has period 5.at n=25A010337
- Triangle read by rows, the inverse Bell transform of n!*binomial(5,n) (without column 0).at n=12A013988