Properties of the Number 2125

Two Thousand One Hundred Twenty-Five

Basics

Value: 2124 → 2125 → 2126

Parity: odd

Prime: No

Previous Prime: 2113

Next Prime: 2129

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 5 ³ × 17

Divisors: 1, 5, 17, 25, 85, 125, 425, 2125

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100001001101

Octal: 4115

Duodecimal: 1291

Hexadecimal: 84d

Square: 4515625

Square Root: 46.09772228646444

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

9-gonal (or enneagonal or nonagonal) numbers: a(n) = n*(7·n-5)/2. A1106

Arithmetic derivative of the primorial base exp-function: a(n) = A003415(A276086(n)). A327860

Number of different products of partitions of n; number of partitions of n into prime parts (1 included); number of distinct orders of Abelian subgroups of symmetric group S_n. A34891

Generalized 9-gonal (or enneagonal) numbers: m*(7·m - 5)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A118277

Partial sums of sequence of odd primes (A065091); a(n) = sum of the first n odd primes. A71148

Integers of the form m*(m + 6)/7. A274978

Numbers n that are the hypotenuse of exactly 10 distinct integer-sided right triangles, i.e., n² can be written as a sum of two squares in 10 ways. A97225

Numbers k such that σ(k) is either their sibling in Doudna tree (A005940), or one of the sibling's descendants. A347391

Sum of odd numbers in range 10·n to 10·n+9. A53742

5 times pentagonal numbers: 5·n*(3·n-1)/2. A152734