Properties of the Number -7491

Four Hundred Ninety-One

Basics

Value: -7492 → -7491 → -7490

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 11 × 227

Divisors: 1, 3, 11, 33, 227, 681, 2497, 7491

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1110101000011

Octal: -16503

Duodecimal: -4403

Hexadecimal: -1d43

Square: 56115081

Square Root: 86.55056325639943

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

G.f. A(x) satisfies: R(x²*A(x)) = x³ - x⁴, where R(A(x)) = x. A350433

Number of integer partitions of n with no adjacent parts having quotient > 2. A342094

Coordination sequence for (2,4,8) tiling of hyperbolic plane. A265063

a(n) = n*(31·n-1)/2. A22288

a(n) = 6·n² + 4·n + 1. A80859

a(n) = a(n-1) + a(m) for n >= 4, where m = 2^p+1 + 2 - n and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = 1, a(2) = 2, and a(3) = 4. A50053

T(n,k) = 12·A046802(n,k) - 9·A008518(n,k) - 2·A007318(n,k), triangle read by rows (0 <= k <= n). A168293

Numbers that are the sum of six fourth powers in three or more ways. A345560

Numbers that are the sum of seven fourth powers in four or more ways. A345570

Numbers that are the sum of six fourth powers in exactly three ways. A345815