Properties of the Number -741

Seven Hundred Forty-One

Basics

Value: -742 → -741 → -740

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 13 × 19

Divisors: 1, 3, 13, 19, 39, 57, 247, 741

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1011100101

Octal: -1345

Duodecimal: -519

Hexadecimal: -2e5

Square: 549081

Square Root: 27.2213151776324

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

First order recursion: a(0)=1; a(n) = σ(1,n) - a(n-1). A83238

a(n) = ∑_k=1..n (-1)^k+1 * floor(n/(2·k-1))^k. A350167

Numerator of Bernoulli(n, -6/7). A158583

G.f.: ∑_n=-oo..+oo x^n*(n+1/2) * C(x)^4·n-6, where C(x) = 1 + x·C(x)² is the g.f. of the Catalan numbers (A000108). A355864

Triangular numbers: a(n) = binomial(n+1,2) = n*(n+1)/2 = 0 + 1 + 2 + ... + n. A217

Second hexagonal numbers: a(n) = n*(2·n + 1). A14105

a(n) = binomial(n,2): number of size-2 subsets of {0,1,...,n} that contain no consecutive integers. A161680

Sum of divisors of square numbers. A65764

a(n) = (n³ + 2·n)/3. A6527

Number of sublattices of index n in generic 3-dimensional lattice. A1001