ℕ atory
Play Now

Properties of the Number -1256641

Two Hundred Fifty-Six Thousand Six Hundred Forty-One

Basics

Value: -1256642 → -1256641 → -1256640

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 19 2 × 59 2

Divisors: 1, 19, 59, 361, 1121, 3481, 21299, 66139, 1256641

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8109 Try Today's Challenge

Representations

Binary: -100110010110011000001

Octal: -4626301

Duodecimal: -507281

Hexadecimal: -132cc1

Square: 1579146602881

Square Root: 1121

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

Numerator of Euler(n, 13/30). A157490
Non-palindromic squares which when written backwards remain square (and still have the same number of digits). A35090
a(n) = n*(n+1)*(n+2)*(n+3)+1 = (n2 + 3·n + 1)2. A62938
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
T(n,k)=Number of nXk 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column, diagonal or antidiagonal. A207235
T(n,k)=Number of nXk 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal. A207228
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero. A205198
Squares k2 such that reverse(k)2 = reverse(k2), excluding squares of palindromes. A64021
Number of n X 2 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column. A207009
Squares arising as a partial product in A094353 + 1. A94354