Properties of the Number -185745

One Hundred Eighty-Five Thousand Seven Hundred Forty-Five

Basics

Value: -185746 → -185745 → -185744

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 7 × 29 × 61

Divisors: 1, 3, 5, 7, 15, 21, 29, 35, 61, 87

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101101010110010001

Octal: -552621

Duodecimal: -8B5A9

Hexadecimal: -2d591

Square: 34501205025

Square Root: 430.9814381153787

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

Nonpalindromic triangular numbers whose digit reversal is also a triangular number (possibly with fewer digits). A69673

Triangular numbers whose digit reversal is also a triangular number. A61455

Non-palindromic triangular numbers whose reverse is a triangular number with the same number of digits. A66528

a(n) = binomial(F(n), 2) where F(n) = A000045(n). A191797

Triangular numbers whose reverse is also triangular. A66569

Partial sums of dodecahedral numbers (A006566). A116689

Numbers k such that φ(k) is equal to A008473(k-1). A39780

a(n) = m*(m+1)/2, where m = floor(n^5/2). A185542