74
domain: N
Properties
Digital Properties
- Digit Count
- 2
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 114
- Proper Divisor Sum (Aliquot Sum)
- 40
- 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
- 36
- Möbius Function
- 1
- Radical
- 74
- 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
- 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
- 22
- Smith Number
- no
Classification
- Natural
- yes
- Even
- yes
- Odd
- 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
Names
- German
- vierundsiebzig· ordinal: vierundsiebzigste
- English
- seventy-four· ordinal: seventy-fourth
- Spanish
- setenta y cuatro· ordinal: 74º
- French
- soixante-quatorze· ordinal: soixante-quatorzième
- Italian
- settantaquattro· ordinal: 74º
- Latin
- septuaginta quattuor· ordinal: 74.
- Portuguese
- setenta e quatro· ordinal: 74º
Appears in sequences
- Number of primitive permutation groups of degree n.at n=63A000019
- The positive integers. Also called the natural numbers, the whole numbers or the counting numbers, but these terms are ambiguous.at n=73A000027
- Numbers that are not squares (or, the nonsquares).at n=65A000037
- 1-digit numbers arranged in alphabetical order, then the 2-digit numbers arranged in alphabetical order, then the 3-digit numbers, etc.at n=59A000052
- Numbers k such that k^4 + 1 is prime.at n=13A000068
- Odious numbers: numbers with an odd number of 1's in their binary expansion.at n=37A000069
- 2nd power of rooted tree enumerator; number of linear forests of 2 rooted trees.at n=5A000106
- Number of binary partitions: number of partitions of 2n into powers of 2.at n=11A000123
- Lower Wythoff sequence (a Beatty sequence): a(n) = floor(n*phi), where phi = (1+sqrt(5))/2 = A001622.at n=45A000201
- a(8i+j) = 13i + a(j), where 1<=j<=8.at n=45A000202
- Number of trees of diameter 6.at n=4A000251
- a(n) = floor(b(n)), where b(n) = tan(b(n-1)), b(0)=1.at n=2A000319
- Sums of three squares: numbers of the form x^2 + y^2 + z^2.at n=63A000378
- 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=37A000379
- Numbers of form x^2 + y^2 + 2*z^2.at n=69A000401
- Numbers that are the sum of 2 nonzero squares.at n=26A000404
- Numbers that are the sum of three nonzero squares.at n=46A000408
- Numbers that are the sum of 4 nonzero squares.at n=58A000414
- Numbers that are the sum of 2 but no fewer nonzero squares.at n=25A000415
- The greedy sequence of integers which avoids 3-term geometric progressions.at n=54A000452