Properties of the Number 1849

One Thousand Eight Hundred Forty-Nine

Basics

Value: 1848 → 1849 → 1850

Parity: odd

Prime: No

Previous Prime: 1847

Next Prime: 1861

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 43 ²

Divisors: 1, 43, 1849

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11100111001

Octal: 3471

Duodecimal: 10A1

Hexadecimal: 739

Square: 3418801

Square Root: 43

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

The squares: a(n) = n². A290

Squares of primes. A1248

Odd squares: a(n) = (2n+1)². Also centered octagonal numbers. A16754

1 and the prime powers p^m where m >= 2, thus excluding the primes. A25475

Prime powers p^e where p is a prime and e >= 2 (prime powers without the primes or 1). A246547

Number of "ON" cells at n-th stage in the "Ulam-Warburton" two-dimensional cellular automaton. A147562

a(n) = period of the sequence {b(m), m>=0}, defined by b(m):=binomial(m+n,n) mod n. A133900

Squarefree numbers squared. A62503

a(n) = n * ∏_{primes p∣n} p. A64549

Numbers of the form p^e where both p and e are prime numbers. A53810