Properties of the Number -2045

Forty-Five

Basics

Value: -2046 → -2045 → -2044

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 5 × 409

Divisors: 1, 5, 409, 2045

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -11111111101

Octal: -3775

Duodecimal: -1225

Hexadecimal: -7fd

Square: 4182025

Square Root: 45.221676218380054

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

Expansion of (∏_k>0 (1 - x^k) / (1 - x^5·k))⁵ in powers of x. A285932

G.f. 1/sum(k>=0, (-1)^k * x^k*(k+1/2)). A208061

a(n) = 2ⁿ - 3. A36563

Number of partially ordered sets ("posets") with n unlabeled elements. A112

Second differences of partition numbers A000041. A53445

Expansion of e.g.f. sinh(exp(x)-1). A24429

New record highs reached in A060030. A60482

a(n) = a(n-1) + 2·a(n-2) - 2·a(n-3). A136252

a(2·k) = 3·2^k - 3, a(2·k+1) = 2^k+2 - 3. A354788

Number of representations of n as a sum of products of pairs of positive integers, considered to be equivalent when terms or factors are reordered. A182269