Properties of the Number -2149

One Hundred Forty-Nine

Basics

Value: -2150 → -2149 → -2148

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 7 × 307

Divisors: 1, 7, 307, 2149

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100001100101

Octal: -4145

Duodecimal: -12B1

Hexadecimal: -865

Square: 4618201

Square Root: 46.357307945997036

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

Coefficients in the power series expansion of A(x) = ∑_n=-oo..+oo n·xⁿ * (1 - xⁿ)^n-2. A356774

a(0) = -1 and a(n) = (-1)ⁿ⁺¹*(3·n² - n + 4)/2 for n >= 1. A173247

Expansion of e.g.f.: tanh(tan(x)/cos(x)). A9818

E.g.f.: exp(sin(x)-log(x+1)). A13341

Sum of divisors of square numbers. A65764

Number of sublattices of index n in generic 3-dimensional lattice. A1001

Number of permutations P of {1,2,...,n} such that P(1)=1 and |P^-1(i+1)-P^-1(i)| equals 1 or 2 for i=1,2,...,n-1. A38718

Numbers which yield a prime whenever a 1 is inserted anywhere in them (including at the beginning or end). A68679

Number of partitions of n into distinct parts, the least being odd. A26832

a(n) = (14·n*(n+3) + (2·n-5)*(-1)ⁿ + 21)/16. A193053