Properties of the Number 71428

Seventy-One Thousand Four Hundred Twenty-Eight

Basics

Value: 71427 → 71428 → 71429

Parity: even

Prime: No

Previous Prime: 71419

Next Prime: 71429

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 7 × 2551

Divisors: 1, 2, 4, 7, 14, 28, 2551, 5102, 10204, 17857

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10001011100000100

Octal: 213404

Duodecimal: 35404

Hexadecimal: 11704

Square: 5101959184

Square Root: 267.2601728653186

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) = floor(10⁶/n). A33426

Number of connected vertex sets of clutters (connected antichains) spanning n vertices. A317635

Floor(1/{(7+n⁴)^1/4}), where {}=fractional part. A184631

a(n) = floor(((n mod 6)+1) * 10^floor((n/6)+1) / 7). A343915

Concatenate the terms of A027750 (omitting spaces and commas), chop into blocks of length 5, then omit any leading zeros. A362446

a(0) = 0; for n > 0, a(n) is the least positive integer not occurring earlier such that the digits in a(n-1)*a(n) are all distinct. A338466

Numbers k such that x^k + x^k-1 + x^k-2 + ... + x + 1 is irreducible over GF(3). A71428

a(n) is equal to the number of positive integers m less than or equal to 10ⁿ such that m is not divisible by at least one of the primes 2,7 and is not divisible by at least one of the primes 3,5. A128956