Properties of the Number -2123

One Hundred Twenty-Three

Basics

Value: -2124 → -2123 → -2122

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 11 × 193

Divisors: 1, 11, 193, 2123

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100001001011

Octal: -4113

Duodecimal: -128B

Hexadecimal: -84b

Square: 4507129

Square Root: 46.07602413403309

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

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of exp(-∑_j>0 sigma_k(j)*x^j/j) in powers of x. A294947

a(n) = 4ⁿ - n⁷. A24043

Start with 2, then successively subtract the primes 3, 5, 7, ... A282329

Number of directed animals of size n (or directed n-ominoes in standard position). A5773

Number of integer partitions of n whose distinct parts are pairwise indivisible. A305148

Triangular array that counts rooted polyominoes. A38622

Triangle T(n,m) = ∑_k=0..m Catalan(n-k)*Catalan(k). A28364

Triangle read by rows, T(n,k) = T(n-1,k) + T(n-2,k) + T(n-1,k-1) + T(n-2,k-1) and T(0,0) = 1. A63967

Number of integer partitions of n whose run-lengths are either weakly increasing or weakly decreasing. A332745

Number of compositions of n with all adjacent parts (x, y) satisfying x >= 2y or y >= 2x. A342333