Properties of the Number 8621

Eight Thousand Six Hundred Twenty-One

Basics

Value: 8620 → 8621 → 8622

Parity: odd

Prime: No

Previous Prime: 8609

Next Prime: 8623

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 37 × 233

Divisors: 1, 37, 233, 8621

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000110101101

Octal: 20655

Duodecimal: 4BA5

Hexadecimal: 21ad

Square: 74321641

Square Root: 92.84934033152847

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

Expansion of g.f. A(x) satisfying A(x) = A( x²*(1+x)⁶ ) / (x*(1+x)⁵). A369549

Iccanobirt numbers (11 of 15): a(n) = R(a(n-1) + R(a(n-2)) + R(a(n-3))), where R is the digit reversal function A004086. A102121

Sum of the second largest parts in the partitions of n into 5 parts. A308826

a(n) is the number of regions formed by n-secting the angles of a pentagon. A335553

a(n) = ∑_k=0..n binomial(2·n+3·k,n-k). A360144

5th-order maximal independent sets in cycle graph. A7388

Semiprimes p1·p2 such that p2 > p1 and p2 mod p1 = 11. A64909

Positive numbers y such that y² is of the form x²+(x+151)² with integer x. A161483

(Product(primitive roots of p) - 1)/p, where p = prime(n) and n > 2. A222009

Product of n and the sum of remainders of n mod k, for k = 1, 2, 3, ..., n. A256532