Properties of the Number 74521

Seventy-Four Thousand Five Hundred Twenty-One

Basics

Value: 74520 → 74521 → 74522

Parity: odd

Prime: Yes

Previous Prime: 74509

Next Prime: 74527

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 74521

Divisors: 1, 74521

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10010001100011001

Octal: 221431

Duodecimal: 37161

Hexadecimal: 12319

Square: 5553379441

Square Root: 272.98534759213726

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(n-1) + a(n-2) + a(n-3) - a(n-4); a(0)=0, a(1)=1, a(2)=1, a(3)=1. A116201

Primes whose base-9 representation is a square in base 10. A267821

a(n) = (3·a(n-3) + a(n-1) * a(n-5)) / a(n-6), a(0) = a(1) = ... = a(5) = 1. A275176

Numbers k such that -3 is a quadratic residue (not necessarily coprime) modulo k, k + 1, k + 2 and k + 3. A318527

Primes of the form (prime(k-1)+1)*(prime(k+1)-1) + 1, k>1. A87106

Primes of the form 9n² - 8. A201961

Number of nX4 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. A281711

Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. A316643

Numbers k such that 62^k - 61^k is prime. A62628

Primes with distinct digits: a(n) is the least prime > a(n-1) such that a(n-1) and a(n) share no common digit. A250173