Properties of the Number 87421

Eighty-Seven Thousand Four Hundred Twenty-One

Basics

Value: 87420 → 87421 → 87422

Parity: odd

Prime: Yes

Previous Prime: 87407

Next Prime: 87427

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 87421

Divisors: 1, 87421

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10101010101111101

Octal: 252575

Duodecimal: 42711

Hexadecimal: 1557d

Square: 7642431241

Square Root: 295.67042462850424

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

Reverse concatenation of distinct digits of all divisors of n in base 10. A256824

Numbers k such that (37^k - 1)/36 is prime. A128003

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 161", based on the 5-celled von Neumann neighborhood. A279501

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 805", based on the 5-celled von Neumann neighborhood. A284140

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 998", based on the 5-celled von Neumann neighborhood. A284546

Expansion of g²/(1 + x·g), where g = 1+x·g³ is the g.f. of A001764. A391294

Primes p such that p+12, (p+1)/2, and (p+13)/2 are also prime. A283869

Primes p such that 2·p⁴-+15 are also prime. A174366

Centered 20-gonal (or icosagonal) primes. A264845

Number of strict integer partitions of 2n with reverse-alternating sum 4. A343941