11570
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 22680
- Proper Divisor Sum (Aliquot Sum)
- 11110
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 4224
- Möbius Function
- 1
- Radical
- 11570
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- 81
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
Appears in sequences
- Almost certainly an erroneous version of A317209.at n=8A013568
- Length of hypotenuse squared in right triangle formed by a prime spiral plotted in Cartesian coordinates.at n=21A048851
- Consider the sequence b(k) such that b(k) and sigma(b(k)) end with the same digit in base 10. Sequence gives values of b(k) such that b(k)/k = 10.at n=23A065255
- a(n) = prime(n+1)^2 + prime(n)^2.at n=20A069484
- Numbers n such that the Diophantine equation x^4+y^5=n^4 has solutions.at n=24A070756
- Triangle read by rows, formed from product of Pascal's triangle (A007318) and Aitken's (or Bell's) triangle (A011971).at n=33A095674
- Record values in A106530.at n=17A106531
- Product_{k=1..n} F(p(k)), where p(k) is the k-th prime and F(k) is the k-th Fibonacci number.at n=4A111135
- Numbers k such that k and k+1 have 4 distinct prime factors.at n=5A140078
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.at n=7A150782
- Numbers that can be represented as a sum of two distinct nontrivial prime powers in three or more ways.at n=9A225104
- Numbers which are the sum of two squared primes in exactly four ways (ignoring order).at n=2A226599
- Unitary anti-perfect numbers.at n=9A240968
- Numbers k that are the product of four distinct primes such that x^2+y^2 = k has integer solutions.at n=13A248712
- Numbers k such that k and k+1 both have 16 divisors.at n=28A274359
- Coefficients arising from the Taylor series expansion of log(arcsin(x)/log(1+x)).at n=8A317209
- Numbers k such that k and k+1 are the product of exactly four distinct primes.at n=3A318896
- Numbers k such that k and k+1 each have at least 4 distinct prime factors.at n=5A321504
- Number of integer partitions of n whose multiplicities all appear the same number of times.at n=45A325333
- Numbers whose base phi representation is symmetrical with respect to the radix point.at n=34A330672