Properties of the Number 8541

Eight Thousand Five Hundred Forty-One

Basics

Value: 8540 → 8541 → 8542

Parity: odd

Prime: No

Previous Prime: 8539

Next Prime: 8543

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 13 × 73

Divisors: 1, 3, 9, 13, 39, 73, 117, 219, 657, 949

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10000101011101

Octal: 20535

Duodecimal: 4B39

Hexadecimal: 215d

Square: 72948681

Square Root: 92.41753080449618

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Numbers k such that the decimal digits of φ(k) are a permutation of those of k. A115921

Odd interprimes divisible by 13. A124619

Second 13-gonal numbers: a(n) = n*(11·n+9)/2. A211013

Iccanobirt numbers (9 of 15): a(n) = R(a(n-1) + a(n-2) + R(a(n-3))), where R is the digit reversal function A004086. A102119

a(n) is the least positive integer such that nextprime(a(n)ⁿ) - prevprime(a(n)ⁿ) = 4. A90125

Maximum value taken on by f(P) = ∑_i=1..n p(i)*p(n+1-i) as {p(1),p(2),...,p(n)} ranges over all permutations P of {1,2,3,...,n}. A87035

Solutions to φ(n) = φ(σ(n)) that are not given by Theorem 3 of Golomb's manuscript. A260021

Primitive terms of A359563: terms of A359563 with no proper divisor in A359563. A359564

Numerators of continued fraction convergents to sqrt(774). A42492

2-ranks of difference sets constructed from Glynn type I hyperovals. A49112