Properties of the Number 1749

One Thousand Seven Hundred Forty-Nine

Basics

Value: 1748 → 1749 → 1750

Parity: odd

Prime: No

Previous Prime: 1747

Next Prime: 1753

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 11 × 53

Divisors: 1, 3, 11, 33, 53, 159, 583, 1749

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11011010101

Octal: 3325

Duodecimal: 1019

Hexadecimal: 6d5

Square: 3059001

Square Root: 41.82104733265297

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

Generalized 9-gonal (or enneagonal) numbers: m*(7·m - 5)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A118277

Expansion of (3-2·x-3·x²)/(1-x-x²-x³). A141523

Partial sums of A299281. A299282

a(n) = n*(3·n + 7)/2. A140090

Number of integer partitions of n with no part dividing all the others. A338470

Expansion of 1/(1 - x - x⁶ - x¹¹ + x¹²). A175773

Number of integer partitions of n whose length and maximum both divide n. A326843

Number of n-node rooted trees of height at most 3. A1383

a(n) = n*(n+20). A120071

Second 9-gonal (or nonagonal) numbers: a(n) = n*(7·n+5)/2. A179986