Properties of the Number 42487

Forty-Two Thousand Four Hundred Eighty-Seven

Basics

Value: 42486 → 42487 → 42488

Parity: odd

Prime: Yes

Previous Prime: 42473

Next Prime: 42491

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 42487

Divisors: 1, 42487

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010010111110111

Octal: 122767

Duodecimal: 20707

Hexadecimal: a5f7

Square: 1805145169

Square Root: 206.12374923817003

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 positive integers <= 10ⁿ that are divisible by no prime exceeding 7. A106600

Primes of the form x² + 7·y², where·and y=x+1 are consecutive natural numbers. A176616

Primes equal to a hexagonal number plus 1. A285790

Prime numbers p for which the quintic polynomial x⁵ - x - 1 modulo p completely factors into linear polynomials. A135844

Prime numbers p not of the form 10·k+1 for which the quintic polynomial x⁵-x-1 modulus p is factorizable into five binomials. A135845

Primes of the form 3n² + 4. A201477

Primes 8k + 7 preceding the maximal gaps in A269519. A269520

Pyramid game person numbers that have integer solutions. A135051

Indices of maximal gaps between consecutive nontrivial zeros of the Riemann ζ function. A208436

Denominators of continued fraction convergents to sqrt(771). A42487