Properties of the Number 30745

Thirty Thousand Seven Hundred Forty-Five

Basics

Value: 30744 → 30745 → 30746

Parity: odd

Prime: No

Previous Prime: 30727

Next Prime: 30757

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 11 × 13 × 43

Divisors: 1, 5, 11, 13, 43, 55, 65, 143, 215, 473

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111100000011001

Octal: 74031

Duodecimal: 15961

Hexadecimal: 7819

Square: 945255025

Square Root: 175.34252193920332

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 n-step mappings with 4 inputs. A5945

Odd composite integers m such that A006497(m) == 3 (mod m). A335669

Number of compositions of n into twin primes (i.e., primes that are members of a twin prime pair, like 3, 5, 7, 11, 13, but not 2 or 23). A77608

First differences of A309226: distances in A008348 from n-th low point to the next. A324783

Number of squares (of another matrix) in M₂(n) - the ring of 2 X 2 matrices over Z_n. A68197

a(n) = ∑_{1 <= x₁, x₂, x₃ <= n} σ( n/gcd(x₁, x₂, x₃, n) ). A373130

a(n) = ∑_{1 <= x₁, x₂ <= n} σ( ( n/gcd(x₁, x₂, n) )² ). A373132

Partial sums of A051947. A50483

a(n) = C(2n-1,n) + C(2n+1,n+1) - C(0,n). A165205

(Prime(prime(n))²-1)/24. A92772