Properties of the Number -128987

One Hundred Twenty-Eight Thousand Nine Hundred Eighty-Seven

Basics

Value: -128988 → -128987 → -128986

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 35

Digital Root: 8

Palindrome: No

Factorization: 128987

Divisors: 1, 128987

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111011111011011

Octal: -373733

Duodecimal: -6278B

Hexadecimal: -1f7db

Square: 16637646169

Square Root: 359.1476019688841

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

Let T(n,d) = number of distinct d-dimensional polyominoes (or polycubes) with n cells (A049429, A049430); sequence gives ∑_d T(n,d). A5519

Second term of weak prime septet: p(m)-p(m-1) < p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2) < p(m+4)-p(m+3) < p(m+5)-p(m+4). A54835

Triangle read by rows: cumulative sums of the rows of A049430. A330891

Third term of weak prime septet: p(m-1)-p(m-2) < p(m)-p(m-1) < p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2) < p(m+4)-p(m+3). A54836

Primes p such that x¹¹ = 2 has a solution mod p, but x^11² = 2 has no solution mod p. A70187

Primes p such that p - m², m = 2, 4, 6, 8, are all (positive) primes. A246874

Triangle read by rows in which the n-th row contains the least set of n successive primes whose successive difference forms an arithmetic progression with common difference 2, (successive even numbers). A94749