Properties of the Number -25285

Twenty-Five Thousand Two Hundred Eighty-Five

Basics

Value: -25286 → -25285 → -25284

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 × 13 × 389

Divisors: 1, 5, 13, 65, 389, 1945, 5057, 25285

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110001011000101

Octal: -61305

Duodecimal: -12771

Hexadecimal: -62c5

Square: 639331225

Square Root: 159.0125781188394

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 ordered triples (a, b, c) with gcd(a, b, c) = 1 and 1 <= {a, b, c} <= n. A71778

Centered 28-gonal numbers. A195314

Beach-Williams Pell numbers of type k² + 4. A212083

Numbers which are both lucky and pentagonal. A128511

a(n) = A077702(n+1)/A077702(n). A77703

Alternating row sums of triangle A090447. A90451

Pentagonal numbers which are products of three distinct primes. A381650

Fibonacci sequence beginning 1, 25. A22395

a(n) = A088418(n+1)/A088418(n). A88419

Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k 1-cell columns starting at level 0 (0<=k<=n). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column. A121585