Properties of the Number 7121

Seven Thousand One Hundred Twenty-One

Basics

Value: 7120 → 7121 → 7122

Parity: odd

Prime: Yes

Previous Prime: 7109

Next Prime: 7127

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 7121

Divisors: 1, 7121

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101111010001

Octal: 15721

Duodecimal: 4155

Hexadecimal: 1bd1

Square: 50708641

Square Root: 84.38601779915912

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

Primes with first digit 7. A45713

Primes of form n² + 4096. A256836

Primes that are the sum of 11 consecutive primes. A127340

Primes dividing nonzero terms in A003095: the iterates of x² + 1 starting at 0. A247981

p, p+6 and p+8 are all primes (A046138) but p+2 is not. A49438

Primes having only {1, 2, 7} as digits. A260889

Primes p such that x⁸ = 2 has a solution mod p, but x^8² = 2 has no solution mod p. A70184

Primes that become squares when prefixed with a 5. A167738

Numbers n such that the decimal number concat(5,n) is a square. A273360

The set of primes of the form 4n+1 that is minimal in the sense of A071062. A111055