Properties of the Number -261121

Two Hundred Sixty-One Thousand One Hundred Twenty-One

Basics

Value: -261122 → -261121 → -261120

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 7 ² × 73 ²

Divisors: 1, 7, 49, 73, 511, 3577, 5329, 37303, 261121

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -111111110000000001

Octal: -776001

Duodecimal: -107141

Hexadecimal: -3fc01

Square: 68184176641

Square Root: 511

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) = (2ⁿ - 1)². A60867

Number of holes in a sheet of paper when you fold it n times and cut off the four corners. A274230

T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..2 nXk array. A218319

T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..3 nXk array. A218372

Expansion of g.f.: 1 / AGM(1-33·x, sqrt((1-9·x)*(1-121·x))). A248167

Discriminants with exactly 2 associated cyclic cubic fields. A343002

Discriminants with at least 2 associated cyclic cubic fields. A343024

a(n) is the largest square with n binary digits. A357754

a(n) = (1-2·n²)². A239607

The numbers n² as n runs through the numbers which are palindromes in base 2. A192775