Properties of the Number 2945

Two Thousand Nine Hundred Forty-Five

Basics

Value: 2944 → 2945 → 2946

Parity: odd

Prime: No

Previous Prime: 2939

Next Prime: 2953

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 19 × 31

Divisors: 1, 5, 19, 31, 95, 155, 589, 2945

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101110000001

Octal: 5601

Duodecimal: 1855

Hexadecimal: b81

Square: 8673025

Square Root: 54.26785420486054

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

Rhombic matchstick numbers: a(n) = n*(3·n+2). A45944

Partial sums of A299277. A299278

Number of partitions of n into parts >= 4. A8484

Squarefree numbers with a divisor having the same sum of prime indices as their quotient. A357854

Number of partitions of n in which the least part is 4. A26797

Indices of primes at which the prime race 4k-1 vs. 4k+1 is tied. A38691

Numbers k such that the geometric mean of φ(k) and σ(k) is an integer. A11257

a(n)=A089551(n)/2. A89558

Numbers k such that 3^k - 14 is prime. A219038

Number of strict integer partitions with sum <= n that can be linearly combined using nonnegative coefficients to obtain n. A365311