Properties of the Number 9642

Nine Thousand Six Hundred Forty-Two

Basics

Value: 9641 → 9642 → 9643

Parity: even

Prime: No

Previous Prime: 9631

Next Prime: 9643

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 1607

Divisors: 1, 2, 3, 6, 1607, 3214, 4821, 9642

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10010110101010

Octal: 22652

Duodecimal: 56B6

Hexadecimal: 25aa

Square: 92968164

Square Root: 98.1936861514018

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

Energy function for hexagonal lattice. A7239

a(1) = a(2) = 1, a(3) = 4; thereafter a(n) = a(n-1) + a(n-3). A1609

a(n) = ∑_i=1..n σ(i)*σ(i+1), where σ(n) = A000203(n) is the sum of the divisors of n. A330322

Number of 8k+1 primes (A007519) in range ]2ⁿ,2ⁿ⁺¹]. A95009

Zeroless numbers n whose digit product squared is equal to the digit product of n². A256115

Trisection of A107926: The least number k such that there are primes p and q with p - q = 6·n+2, p + q = k, and p the least such prime >= k/2. A234955

Number of independent vertex sets and vertex covers in the n-antiprism graph. A286910

Numbers k such that A338338(k) is a prime p that ends a run of three terms in A338338 that are divisible by p. A338344

Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=3, r=3, I={1}. A79996

Iccanobirt prime indices (9 of 15): Indices of prime numbers in A102119. A102139