Properties of the Number -11557

Eleven Thousand Five Hundred Fifty-Seven

Basics

Value: -11558 → -11557 → -11556

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 7 × 13 × 127

Divisors: 1, 7, 13, 91, 127, 889, 1651, 11557

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10110100100101

Octal: -26445

Duodecimal: -6831

Hexadecimal: -2d25

Square: 133564249

Square Root: 107.50348831549607

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

Number of ordered triples (a, b, c) with gcd(a, b, c) = 1 and 1 <= {a, b, c} <= n. A71778

a(n) = p² + p + 1 where p runs through the primes. A60800

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock. A186568

T(n,k) = number of n-bead necklaces labeled with numbers -k..k allowing reversal, with sum zero and three times sum of squares <= n·k*(k+1). A208805

Numbers having exactly four representations by the quadratic form x²+xy+y² with 0<=x<=y. A198775

Numbers that are the sum of eight fourth powers in seven or more ways. A345582

Numbers that are the sum of eight fourth powers in exactly seven ways. A345839

Products of three distinct primes of the form 6·k + 1. A154729

Sum of the divisors of the n-th odd square: a(n) = σ((2·n-1)²). A379223

a(n) = 9·n² - 3·n + 1 with n>0. A304163