325
domain: N
Properties
Digital Properties
- Digit Count
- 3
- 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
- 434
- Proper Divisor Sum (Aliquot Sum)
- 109
- 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
- 65
- 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
- yes
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- yes
- 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
- 24
- 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
- dreihundertfünfundzwanzig· ordinal: dreihundertfünfundzwanzigste
- English
- three hundred twenty-five· ordinal: three hundred twenty-fifth
- Spanish
- trescientos veinticinco· ordinal: 325º
- French
- trois cent vingt-cinq· ordinal: trois cent vingt-cinqième
- Italian
- trecentoventicinque· ordinal: 325º
- Latin
- trecenti viginti quinque· ordinal: 325.
- Portuguese
- trezentos e vinte e cinco· ordinal: 325º
Appears in sequences
- Hexagonal numbers: a(n) = n*(2*n-1).at n=13A000384
- Numbers that are the sum of 2 squares in exactly 3 ways.at n=0A000443
- Smallest number that is the sum of 2 squares (allowing zeros) in exactly n ways.at n=2A000446
- Smallest number that is the sum of 2 squares in at least n ways.at n=2A000448
- Moser-de Bruijn sequence: sums of distinct powers of 4.at n=27A000695
- Number of compositions of n into 5 ordered relatively prime parts.at n=7A000743
- Number of twin prime pairs < square of n-th prime.at n=32A000885
- 9-gonal (or enneagonal or nonagonal) numbers: a(n) = n*(7*n-5)/2.at n=10A001106
- Number of commutative semigroups of order n.at n=5A001426
- a(n) = (5^n + 5^floor(n/2))/2.at n=4A001447
- a(1)=2, a(2)=3; for n >= 3, a(n) is smallest number that is uniquely of the form a(j) + a(k) with 1 <= j < k < n.at n=55A001857
- Nearest integer to n^2/8.at n=51A001971
- Expansion of 1/((1-x)^2*(1-x^4)) = 1/( (1+x)*(1+x^2)*(1-x)^3 ).at n=48A001972
- Number of partitions of floor(5n/2) into n nonnegative integers each no more than 5.at n=13A001975
- Generalized sum of divisors function.at n=19A002130
- Numbers y such that p^2 = x^2 + y^2, 0 < x < y, p = A002144(n).at n=36A002365
- a(n) = n^2 + 1.at n=18A002522
- Numbers k such that (k^2 + k + 1)/3 is prime.at n=43A002640
- Numbers k such that (k^2 + 1)/2 is prime.at n=51A002731
- Numbers m such that 6m-1, 6m+1 are twin primes.at n=58A002822