Properties of the Number -138601

One Hundred Thirty-Eight Thousand Six Hundred One

Basics

Value: -138602 → -138601 → -138600

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 17 × 31 × 263

Divisors: 1, 17, 31, 263, 527, 4471, 8153, 138601

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

375 Try Today's Challenge

Representations

Binary: -100001110101101001

Octal: -416551

Duodecimal: -68261

Hexadecimal: -21d69

Square: 19210237201

Square Root: 372.2915524155766

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

Composite numbers k such that k divides F(k-1) where F(j) are the Fibonacci numbers. A69106

Sieve performed by successive iterations of steps where step m is: keep m terms, remove the next 4 and repeat; as m = 1,2,3,.. the remaining terms form this sequence. A112562

Smallest number that is centered polygonal in exactly n ways. A63773

Numbers k that divide Fibonacci(k-1) but do not divide Fibonacci(k) - 1. A94410

a(1) = 1, a(n) = smallest triangular number of the form k·a(n-1) + 1 for some positive integer k. A68082

Number of 2 X n 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing. A224000

Triangular numbers representable as triangular(x)*triangular(y)+1. A226389

a(n) = the least integer that is centered polygonal in exactly n ways. A279830