Properties of the Number 3121

Three Thousand One Hundred Twenty-One

Basics

Value: 3120 → 3121 → 3122

Parity: odd

Prime: Yes

Previous Prime: 3119

Next Prime: 3137

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 3121

Divisors: 1, 3121

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110000110001

Octal: 6061

Duodecimal: 1981

Hexadecimal: c31

Square: 9740641

Square Root: 55.86591089385369

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

Centered square numbers: a(n) = 2·n*(n+1)+1. Sums of two consecutive squares. Also, consider all Pythagorean triples (X, Y, Z=Y+1) ordered by increasing Z; then sequence gives Z values. A1844

Primes whose decimal representation is a valid number in base 9 and interpreted as such is again a prime. A235395

Primes with 7 as smallest primitive root. A1126

Primes of the form j² + (j+1)². A27862

Primes p such that a pure prime power occurs between p and the next prime. A53607

Primes of the form x² + 45y². A107152

Primes p such that continued fraction of (1 + sqrt(p))/2 has period 15: primes in A146338. A146360

a(n) = 8·n² - 4·n + 1. A80856

Primes prime(k) such that all integers in [(prime(k-1)+1)/2,(prime(k)-1)/2] are composite, excluding those primes in A080359. A164294

Primes with first digit 3. A45709