Properties of the Number -166725

One Hundred Sixty-Six Thousand Seven Hundred Twenty-Five

Basics

Value: -166726 → -166725 → -166724

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 ² × 13 × 19

Divisors: 1, 3, 5, 9, 13, 15, 19, 25, 27, 39

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101000101101000101

Octal: -505505

Duodecimal: -80599

Hexadecimal: -28b45

Square: 27797225625

Square Root: 408.319727664486

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 ways of writing n as the sum of 9 triangular numbers. A226253

Integers k such that k = Sum k/(p_i + j), where p_i are the prime factors of k (with multiplicity). Case j = 2. A380901

Decimal values of the antidiagonals of the Sierpinski carpet considered as binary numbers. A292689

The hyper-Wiener index of the triangular graph T(n) (n >= 1). A228317

a(n) = ord(2,A006935(n)/2), where ord(k,m) is the multiplicative order of k modulo m. A350084

a(n) = 225*(n-1)*(n-2)/2. A27470

Half the number of length n integer sequences with sum zero and sum of squares 1152. A157556

Positive integers that are palindromes (of even length) in binary, each made by concatenating two identical binary palindromes. A161400