145
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
- 4
- Divisor Sum
- 180
- Proper Divisor Sum (Aliquot Sum)
- 35
- 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
- 112
- Möbius Function
- 1
- Radical
- 145
- Omega Function (Ω)
- 2
- 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
- 116
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- 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
- einshundertfünfundvierzig· ordinal: einshundertfünfundvierzigste
- English
- one hundred forty-five· ordinal: one hundred forty-fifth
- Spanish
- ciento cuarenta y cinco· ordinal: 145º
- French
- cent quarante-cinq· ordinal: cent quarante-cinqième
- Italian
- centoquarantacinque· ordinal: 145º
- Latin
- centum quadraginta quinque· ordinal: 145.
- Portuguese
- cento e quarenta e cinco· ordinal: 145º
Appears in sequences
- Local stops on New York City 1 Train (Broadway-7 Avenue Local) subway.at n=18A000053
- Local stops on New York City A line subway.at n=16A000054
- Take sum of squares of digits of previous term, starting with 2.at n=38A000216
- Take sum of squares of digits of previous term, starting with 2.at n=46A000216
- Take sum of squares of digits of previous term, starting with 2.at n=6A000216
- Take sum of squares of digits of previous term, starting with 2.at n=30A000216
- Take sum of squares of digits of previous term, starting with 2.at n=54A000216
- Take sum of squares of digits of previous term, starting with 2.at n=62A000216
- Take sum of squares of digits of previous term, starting with 2.at n=14A000216
- Take sum of squares of digits of previous term, starting with 2.at n=22A000216
- Take sum of squares of digits of previous term; start with 3.at n=32A000218
- Take sum of squares of digits of previous term; start with 3.at n=24A000218
- Take sum of squares of digits of previous term; start with 3.at n=16A000218
- Take sum of squares of digits of previous term; start with 3.at n=40A000218
- Take sum of squares of digits of previous term; start with 3.at n=8A000218
- Take sum of squares of digits of previous term; start with 3.at n=64A000218
- Take sum of squares of digits of previous term; start with 3.at n=56A000218
- Take sum of squares of digits of previous term; start with 3.at n=48A000218
- Take sum of squares of digits of previous term; start with 5.at n=13A000221
- Take sum of squares of digits of previous term; start with 5.at n=5A000221