Properties of the Number 7801

Seven Thousand Eight Hundred One

Basics

Value: 7800 → 7801 → 7802

Parity: odd

Prime: No

Previous Prime: 7793

Next Prime: 7817

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 29 × 269

Divisors: 1, 29, 269, 7801

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111001111001

Octal: 17171

Duodecimal: 4621

Hexadecimal: 1e79

Square: 60855601

Square Root: 88.32326986700618

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

Centered 10-gonal numbers. A62786

Numbers whose multiset multisystem (A302242) is crossing. A324170

Centered 24-gonal numbers. A69190

Numbers in base 10 that are palindromic in bases 7 and 8. A99145

Number of partitions of n with odd minimal and maximal parts. A325338

T(n,k)=Number of nXnXn triangular 0..k arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and every horizontal row having the same average value. A214540

Number of compositions of n with no part divisible by the next or the prior. A328508

Matrix square-root of triangle A105615. A105623

T(n,k)=Number of nXk 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column. A207015

NSW pseudoprimes: odd composite numbers k such that A002315((k-1)/2) == 1 (mod k). A330276