Properties of the Number 7125

Seven Thousand One Hundred Twenty-Five

Basics

Value: 7124 → 7125 → 7126

Parity: odd

Prime: No

Previous Prime: 7121

Next Prime: 7127

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 ³ × 19

Divisors: 1, 3, 5, 15, 19, 25, 57, 75, 95, 125

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101111010101

Octal: 15725

Duodecimal: 4159

Hexadecimal: 1bd5

Square: 50765625

Square Root: 84.40971508067067

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

Hypotenuses for which there exist exactly 3 distinct integer triangles. A84647

a(n) = n*(n+1)*(n+2)*(n+7)/24. A5582

Numbers n such that nextprime(n³)-prevprime(n³) = 4. A90121

Numbers that are the sum of ten fourth powers in seven or more ways. A345600

Numbers that are the sum of ten fourth powers in eight or more ways. A345601

Numbers that are the sum of ten fourth powers in nine or more ways. A345602

Numbers that are the sum of ten fourth powers in exactly nine ways. A345861

Number of 4k+3 primes whose Legendre-vector is not Dyck-path (A095103) in range ]2ⁿ,2ⁿ⁺¹]. A95093

Numbers k such that (k³ - 2, k³ + 2) is a pair of cousin primes (see A178227). A178228

Odd numbers k for which gcd(k, A003961(k)) = gcd(σ(k), A003961(k)) > 1, where A003961(n) is fully multiplicative with a(prime(k)) = prime(k+1), and σ is the sum of divisors function. A349176