Properties of the Number -1361

Three Hundred Sixty-One

Basics

Value: -1362 → -1361 → -1360

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 1361

Divisors: 1, 1361

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10101010001

Octal: -2521

Duodecimal: -955

Hexadecimal: -551

Square: 1852321

Square Root: 36.89173349139343

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) = 2·a(n-1) - a(n-2) - a(n-4). A131041

Partial alternating sums of the sigma₂ function: a(n) = ∑_k=1..n (-1)^k+1 * sigma₂(k). A379921

a(n) = 2·a(n - 2) - a(n - 1) for n>1, a(0) = 4, a(1) = 5. A268741

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 291", based on the 5-celled von Neumann neighborhood. A271132

Primes of the form 2x² + 2xy + 17y². A139827

Primes of form 8n+1, that is, primes congruent to 1 mod 8. A7519

Record gaps between primes (upper end) (compare A002386, which gives lower ends of these gaps). A101

Primes whose base-4 representation also is the base 2-representation of a prime. A235461

Primes p such that q = (p² + 1)/2 is also a prime. A48161

Indices of prime Lucas numbers. A1606