Properties of the Number 2491

Two Thousand Four Hundred Ninety-One

Basics

Value: 2490 → 2491 → 2492

Parity: odd

Prime: No

Previous Prime: 2477

Next Prime: 2503

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 47 × 53

Divisors: 1, 47, 53, 2491

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110111011

Octal: 4673

Duodecimal: 1537

Hexadecimal: 9bb

Square: 6205081

Square Root: 49.90991885387112

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

Number of integer partitions of n with distinct differences between successive parts. A325325

Products of 2 successive primes. A6094

Number of squarefree integers in closed interval [2ⁿ, -1 + 2·2ⁿ], i.e., among 2ⁿ consecutive numbers beginning with 2ⁿ. A77643

Number of partitions of n for which the number of even parts is equal to the positive alternating sum of the parts. A277579

Numerator of 1/9 - 1/n². A61039

Number of squarefree integers not exceeding 2ⁿ. A143658

Convolution of A000203 with itself. A385

D-toothpick sequence of the third kind starting with a single toothpick. A220500

Ruth-Aaron numbers (2): sum of prime divisors of n = sum of prime divisors of n+1 (both taken with multiplicity). A39752

Coefficient of q² in ν(n), where ν(0)=1, ν(1)=b and, for n>=2, ν(n)=b*ν(n-1)+λ*(1+q+q²+...+q^n-2)*ν(n-2) with (b,λ)=(1,1). A74082