Properties of the Number 1291

One Thousand Two Hundred Ninety-One

Basics

Value: 1290 → 1291 → 1292

Parity: odd

Prime: Yes

Previous Prime: 1289

Next Prime: 1297

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 1291

Divisors: 1, 1291

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100001011

Octal: 2413

Duodecimal: 8B7

Hexadecimal: 50b

Square: 1666681

Square Root: 35.93048844644336

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

Greater of twin primes. A6512

Primes having only {1, 2, 9} as digits. A385776

Primes of the form 10·n+1. A30430

Primes that become a different prime under the mapping 0 <=> 2. A180517

Primes congruent to 1 or 19 (mod 30). A33212

Primes of the form 4·x²+x·y-4·y² (as well as of the form 4·x²+9·x*y+y²). A141111

Number of integer partitions of n that can be partitioned into two or more blocks with equal sums. A321452

Partial sums of A000337(n+4), n >= 0. A45618

Primes of the form 3·p - 2 such that p is a prime. A91180

Primes whose base-5 representation also is the base-4 representation of a prime. A235615