Properties of the Number -1745

Seven Hundred Forty-Five

Basics

Value: -1746 → -1745 → -1744

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 349

Divisors: 1, 5, 349, 1745

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -11011010001

Octal: -3321

Duodecimal: -1015

Hexadecimal: -6d1

Square: 3045025

Square Root: 41.773197148410844

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

Values of n such that L(14) and N(14) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227517

Coefficients in the expansion of 1/([r] + [2r]x + [3r]x² + ...); [ ] = floor, r = sqrt(6)/2. A279594

Coordination sequence T1 for Zeolite Code LTA and ρ. A8137

Number of partitions of 2n with all subsums different from n. A6827

Number of non-biquanimous integer partitions of n. A371795

Numbers that are the sum of 3 nonzero squares in exactly 9 ways. A25329

Number of strict integer partitions of n with all distinct lengths of maximal anti-runs (decreasing by more than 1). A384880

5-Knödel numbers. A50993

Numbers n such that n·10ⁿ - 1 is prime. A59671

a(n) = ∑_k=1..n k*φ(k). A11755