Properties of the Number 7129

Seven Thousand One Hundred Twenty-Nine

Basics

Value: 7128 → 7129 → 7130

Parity: odd

Prime: Yes

Previous Prime: 7127

Next Prime: 7151

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 7129

Divisors: 1, 7129

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101111011001

Octal: 15731

Duodecimal: 4161

Hexadecimal: 1bd9

Square: 50822641

Square Root: 84.43340571124678

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) = numerator of harmonic number H(n) = ∑_i=1..n 1/i. A1008

Primes with first digit 7. A45713

Number of integer partitions of n with as many even parts as even conjugate parts. A350948

a(n) = (1/1 + 1/2 + ... + 1/n)*lcm{1,2,...,n}. A25529

Smallest number that requires n iterations of the unitary totient function (A047994) to reach 1. A3271

Primes p such that the multiplicative order of 2 modulo p is (p-1)/4. A1134

Primes p for which the period of reciprocal 1/p is (p-1)/12. A56217

Triangle read by rows: square of the lower triangular mean matrix. A27446

Primes p such that q-p = 22, where q is the next prime after p. A61779

Prime values of A001008, the numerators of the harmonic numbers. A67657