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Properties of the Number -128520

One Hundred Twenty-Eight Thousand Five Hundred Twenty

Basics

Value: -128521 → -128520 → -128519

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 3 × 3 3 × 5 × 7 × 17

Divisors: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11111011000001000

Octal: -373010

Duodecimal: -62460

Hexadecimal: -1f608

Square: 16517390400

Square Root: 358.49686191095174

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 square permutations of n elements. A3483
Number A(n,k) of permutations on [n] that are the k-th power of a permutation; square array A(n,k), n>=0, k>=0, read by antidiagonals. A247005
Numbers k such that σ(k) > 4·k. A68404
Numbers n that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (n raised to k+1 must not be a multiple). Case k=13. A135198
Numbers k such that σ(k) >= 4·k. A23198
Numbers n whose divisors can be partitioned into four disjoint sets whose sums are all σ(n)/4. A204831
Numbers n for which there exists k > n such that A000203(k) = A000203(n) and A007947(k) = A007947(n), where A000203 gives the sum of divisors, and A007947 gives the squarefree kernel of n. A255334
Numbers k such that the total number of 1's in the binary expansion of all the divisors of k sets a new record. A93687
Positions of records in A356018, i.e., integers whose number of evil divisors sets a new record. A356020
Primitive 4-abundant numbers: Numbers k such that σ(k) > 4k (A068404) all of whose proper divisors d are 4-deficient numbers (having σ(d) < 4d). A307114