Properties of the Number -772641

Seven Hundred Seventy-Two Thousand Six Hundred Forty-One

Basics

Value: -772642 → -772641 → -772640

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 293 ²

Divisors: 1, 3, 9, 293, 879, 2637, 85849, 257547, 772641

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10111100101000100001

Octal: -2745041

Duodecimal: -313169

Hexadecimal: -bca21

Square: 596974114881

Square Root: 879

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

Triangle read by rows: row n gives coefficients of increasing powers of·in the polynomial (-1)ⁿ*p(n), where p(n) is defined as follows. Let f(n) = n*(n+1)/2, g(n) = f(n)+1; then p(-1) = 0, p(0) = 1 and for n >= 1, p(n) = (x - f(n))*p(n - 1) - g(n - 1)²*p(n - 2). A135049

Odd squares k for which A379113(k) > 1, i.e., k that have a proper unitary divisor d > 1 such that A048720(A065621(σ(d)),σ(k/d)) is equal to σ(k). A379121

Coefficients of power series A(x) consist entirely of squares, where A(x) = A083352(x)² + A083352(x) - 1. A83353

Odd squares not of the form p + 2^k with p prime. A276567