Properties of the Number 57123

Fifty-Seven Thousand One Hundred Twenty-Three

Basics

Value: 57122 → 57123 → 57124

Parity: odd

Prime: No

Previous Prime: 57119

Next Prime: 57131

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 11 × 577

Divisors: 1, 3, 9, 11, 33, 99, 577, 1731, 5193, 6347

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101111100100011

Octal: 157443

Duodecimal: 29083

Hexadecimal: df23

Square: 3263037129

Square Root: 239.00418406379416

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

a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 0, 1, 1, 0. A25250

Numbers k such that k¹² == 1 (mod 13⁴). A56095

Sequence is {a(5,n)}, where a(m,n) is defined at sequence A110665. A110670

Central element of a series of 5 successive nonsquarefree numbers. A188296

Expansion of (1 - 6·x + x² - 8·x³ + 16·x⁴)^-1/2. A298611

Start with 1 and repeatedly reverse the digits and add 74 to get the next term. A118225

Generalized Somos-5 sequence with a(n) = (-a(n-1)*a(n-4) + 42·a(n-2)*a(n-3))/a(n-5), a(-n) = a(n), a(0) = a(1) = 1, a(2) = 3. A360187

Global ranks of terms of A057122: tells which terms of A014486 form rooted plane binary trees also when interpreted as codes for ordinary rooted planar trees. A57123

Indices of centered 9-gonal numbers (A060544) that are also squares (A000290). A280181