Properties of the Number 8401

Eight Thousand Four Hundred One

Basics

Value: 8400 → 8401 → 8402

Parity: odd

Prime: No

Previous Prime: 8389

Next Prime: 8419

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 31 × 271

Divisors: 1, 31, 271, 8401

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10000011010001

Octal: 20321

Duodecimal: 4A41

Hexadecimal: 20d1

Square: 70576801

Square Root: 91.65696918401787

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

a(n) is the least k such that the remainder when 8^k is divided by k is n. A119714

Pseudoprimes to base 3. A5935

Strong pseudoprimes to base 3. A20229

Nonprimes k such that 3^k == 3 (mod k). A122780

Euler pseudoprimes to base 3: composite integers such that abs(3^{(n - 1}/2)) == 1 mod n. A262051

Concentric 20-gonal numbers. A195148

T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally. A232295

Pseudoprimes to base 10. A5939

20-gonal (or icosagonal) numbers: a(n) = n*(9·n-8). A51872

a(n) = (n³ - 7·n + 12)/6. A105163