Properties of the Number -28125

Twenty-Eight Thousand One Hundred Twenty-Five

Basics

Value: -28126 → -28125 → -28124

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 ⁵

Divisors: 1, 3, 5, 9, 15, 25, 45, 75, 125, 225

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110110111011101

Octal: -66735

Duodecimal: -14339

Hexadecimal: -6ddd

Square: 791015625

Square Root: 167.70509831248424

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Triangle read by rows: T(n, m) = S1(n, m)*5^n-m, where S1 are the signed Stirling numbers of first kind A008275 (n >= 1, 1 <= m <= n). A51150

Numbers of the form 3ⁱ*5^j with i, j >= 0. A3593

Hypotenuses for which there exist exactly 5 distinct Pythagorean triangles. A84649

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of nⁿ as Sum(k=0..n)T(n,k)*binomial(n,k). A244136

Numbers whose prime factors are 3 and 5. A33849

Least k such that decimal representation of k·n contains only digits 0 and 9. A96688

Product of the 5th power of a prime and different distinct prime of the 2nd power (p⁵*q²). A179646

Smallest label f(T) given to a rooted tree T with n nodes in Matula-Goebel labeling. A5517

n satisfying σ(n+1) = σ(n-1). A55574

Pointwise product of the arithmetic derivative and the primorial base exp-function. A358669