Properties of the Number 61801

Sixty-One Thousand Eight Hundred One

Basics

Value: 61800 → 61801 → 61802

Parity: odd

Prime: No

Previous Prime: 61781

Next Prime: 61813

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 23 × 2687

Divisors: 1, 23, 2687, 61801

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111000101101001

Octal: 170551

Duodecimal: 2B921

Hexadecimal: f169

Square: 3819363601

Square Root: 248.5980691799516

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 nonsense sequence. A89075

a(n) = (n-2)*a(n-2) + a(n-3), with a(1)=0, a(2)=1, a(3)=1. A121953

Sp = reversal of some square s where s = x² for x = 1,2,.. (ignoring leading zeros). Sp is in the sequence if it is semiprime. A242097

Number of 2Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 4 neighboring 1s. A297734

a(n) = (7·6ⁿ - 2)/5. A61801