125
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 156
- Proper Divisor Sum (Aliquot Sum)
- 31
- 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
- 100
- Möbius Function
- 0
- Radical
- 5
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 1
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
- yes
- 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
- 108
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- yes
- Achilles Number
- no
- Perfect Power
- yes
- Smooth Number
- yes
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Names
- German
- einshundertfünfundzwanzig· ordinal: einshundertfünfundzwanzigste
- English
- one hundred twenty-five· ordinal: one hundred twenty-fifth
- Spanish
- ciento veinticinco· ordinal: 125º
- French
- cent vingt-cinq· ordinal: cent vingt-cinqième
- Italian
- centoventicinque· ordinal: 125º
- Latin
- centum viginti quinque· ordinal: 125.
- Portuguese
- cento e vinte e cinco· ordinal: 125º
Appears in sequences
- Local stops on New York City 1 Train (Broadway-7 Avenue Local) subway.at n=16A000053
- Local stops on New York City A line subway.at n=14A000054
- a(n) = floor(n^(3/2)).at n=25A000093
- Denumerants: Expansion of 1/((1-x)*(1-x^2)*(1-x^5)).at n=46A000115
- Positive zeros of Bessel function of order 0 rounded to nearest integer.at n=39A000134
- Number of partitions into non-integral powers.at n=7A000135
- a(n) = a(n-1) + a(n-2) - 2, a(0) = 4, a(1) = 3.at n=10A000211
- Number of trees on n labeled nodes: n^(n-2) with a(0)=1.at n=5A000272
- Numbers m such that Fibonacci(m) ends with m.at n=12A000350
- Powers of 5: a(n) = 5^n.at n=3A000351
- Numbers where total number of 1-bits in the exponents of their prime factorization is even; a 2-way classification of integers: complement of A000028.at n=66A000379
- Numbers that are the sum of 2 nonzero squares.at n=43A000404
- Numbers that are the sum of 2 but no fewer nonzero squares.at n=41A000415
- n written in base where place values are positive cubes.at n=48A000433
- Number of partially labeled trees with n nodes (4 of which are labeled).at n=1A000485
- Number of partially labeled trees with n nodes (5 of which are labeled).at n=0A000526
- The cubes: a(n) = n^3.at n=5A000578
- Expansion of Product_{k>=0} (1 + x^(2k+1)); number of partitions of n into distinct odd parts; number of self-conjugate partitions; number of symmetric Ferrers graphs with n nodes.at n=53A000700
- Number of compositions of n into 5 ordered relatively prime parts.at n=5A000743
- Sum of upward diagonals of Eulerian triangle.at n=7A000800