Properties of the Number -42280

Forty-Two Thousand Two Hundred Eighty

Basics

Value: -42281 → -42280 → -42279

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 5 × 7 × 151

Divisors: 1, 2, 4, 5, 7, 8, 10, 14, 20, 28

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1010010100101000

Octal: -122450

Duodecimal: -20574

Hexadecimal: -a528

Square: 1787598400

Square Root: 205.621010599598

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

Fifth subdiagonal in array of n-gonal numbers A081422. A81436

Triangle read by rows: T(n, k) = number of matchings of 2n people with partners (of either sex) such that exactly k couples are left together. A55140

Nonunitary weird numbers: numbers that are nonunitary abundant but not nonunitary pseudoperfect. A327948

Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w+2x+3y>0. A211621

Number T(n,k) of endofunctions on [n] with exactly k cycles of length larger than 1; triangle T(n,k), n>=0, 0<=k<=floor(n/2), read by rows. A350446

A129957(n) - n*(n-1)/2. A129959

1/4 the number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero. A189953

a(n) = ∑_k=0..n r₄(k² + 1), where r₄(k) is the number of ways of writing k as a sum of 4 squares (A000118). A333174