Properties of the Number 72905

Seventy-Two Thousand Nine Hundred Five

Basics

Value: 72904 → 72905 → 72906

Parity: odd

Prime: No

Previous Prime: 72901

Next Prime: 72907

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 7 × 2083

Divisors: 1, 5, 7, 35, 2083, 10415, 14581, 72905

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001110011001001

Octal: 216311

Duodecimal: 36235

Hexadecimal: 11cc9

Square: 5315139025

Square Root: 270.00925910049824

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 rooted trees where any 2 subtrees extending from the same node have a different number of nodes. A32305

a(n) = ∑_i=0..n binomial(2·n-i, n+i). A108081

Partial sums of A053308. A53309

Sum along upward diagonal of Pascal triangle from center. A10757

T(n, 2n-9), T given by A027926. A27932

Number of linear chord diagrams having n chords and no chord length larger than five. A293997

a(n) = T(2n,n+4), T given by A027948. A27952

a(n) = greatest number in row n of array T given by A027948. A27957

Numbers k such that k | sigma₇(k) - φ(k)⁷. A55701

Least k such that k·6ⁿ-1 , k·6ⁿ+1, and 2·k*6ⁿ-1 are prime; that is, twin primes and a Sophie Germain prime. A212481