Properties of the Number -121771

One Hundred Twenty-One Thousand Seven Hundred Seventy-One

Basics

Value: -121772 → -121771 → -121770

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 13 × 17 × 19 × 29

Divisors: 1, 13, 17, 19, 29, 221, 247, 323, 377, 493

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: Yes

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -11101101110101011

Octal: -355653

Duodecimal: -5A577

Hexadecimal: -1dbab

Square: 14828176441

Square Root: 348.95701741045417

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

Triangular numbers which are sums of three consecutive primes. A167788

Triangle T(n,k) read by rows of the smallest n-gonal number greater than 1 that is also k-gonal, or 0 if none exists, for 3 <= k <= n. A189216

Heptagonal hexagonal numbers. A48903

Numbers k such that σ(k)/φ(k) = 25/16. A164648

Heptagonal triangular numbers. A46194

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 654", based on the 5-celled von Neumann neighborhood. A283587

a(n) = (n-1)*(n-2)*(n²+9·n+12)/24. A323847

Numbers that are n-gons for three or more n's, where n=3,4,5,...,16. A62712

Triangular numbers composed of digits {1,2,7}. A119105

Q-residue of the triangle A094727, where Q=Pascal's triangle. (See Comments.) A193659