142
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 7
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 216
- Proper Divisor Sum (Aliquot Sum)
- 74
- 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
- 70
- Möbius Function
- 1
- Radical
- 142
- 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
- 103
- 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
- yes
- Odd
- no
Names
- German
- einshundertzweiundvierzig· ordinal: einshundertzweiundvierzigste
- English
- one hundred forty-two· ordinal: one hundred forty-second
- Spanish
- ciento cuarenta y dos· ordinal: 142º
- French
- cent quarante-deux· ordinal: cent quarante-deuxième
- Italian
- centoquarantadue· ordinal: 142º
- Latin
- centum quadraginta duo· ordinal: 142.
- Portuguese
- cento e quarenta e dois· ordinal: 142º
Appears in sequences
- Expansion of Product_{m >= 1} (1 + x^m); number of partitions of n into distinct parts; number of partitions of n into odd parts.at n=25A000009
- Numbers k such that k^4 + 1 is prime.at n=22A000068
- a(n) = 2*a(n-1) - a(n-2) + a(n-3) + 2^(n-1).at n=6A000253
- Numbers that are the sum of 3 but no fewer nonzero squares.at n=62A000419
- 1 together with products of 2 or more distinct primes.at n=53A000469
- Number of nonnegative solutions to x^2 + y^2 + z^2 <= n.at n=33A000606
- Numbers ending with a vowel in American English.at n=64A000861
- Semiprimes (or biprimes): products of two primes.at n=46A001358
- Number of stacks, or arrangements of n pennies in contiguous rows, each touching 2 in row below.at n=14A001524
- Numbers with an odd number of digits.at n=52A001633
- List of numbers whose digits contain no loops (version 1).at n=61A001729
- 2 together with primes multiplied by 2.at n=20A001747
- Primes together with primes multiplied by 2.at n=53A001751
- Number of connected functions on n labeled nodes.at n=3A001865
- a(n) = Fibonacci(n+3) - 2.at n=9A001911
- Numbers k such that 4*k^2 + 1 is prime.at n=46A001912
- v-pile positions of the 4-Wythoff game with i=1.at n=27A001964
- Numbers congruent to {2, 4, 8, 16} (mod 20).at n=28A002081
- Numbers k for which the rank of the elliptic curve y^2 = x^3 - k is 0.at n=56A002150
- Numbers k for which the rank of the elliptic curve y^2 = x^3 + k is 2.at n=16A002155