Properties of the Number 1625

One Thousand Six Hundred Twenty-Five

Basics

Value: 1624 → 1625 → 1626

Parity: odd

Prime: No

Previous Prime: 1621

Next Prime: 1627

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 5 ³ × 13

Divisors: 1, 5, 13, 25, 65, 125, 325, 1625

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001011001

Octal: 3131

Duodecimal: B35

Hexadecimal: 659

Square: 2640625

Square Root: 40.311288741492746

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

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

Number of partitions of n into distinct parts in which the number of parts divides n. A102627

Coordination sequence for 3D uniform tiling formed by stacking parallel layers of the 4.6.12 2D tiling (cf. A072154). A299258

Numbers of the form 9·k² + 8·k, k an integer. A218864

First term of n-th difference sequence of (floor(k·r)), r = sqrt(2), k >= 0. A325664

5 times triangular numbers: a(n) = 5·n*(n+1)/2. A28895

Array read by descending antidiagonals: T(n,k) is the number of unoriented strings with n beads of k or fewer colors. A277504

Number of partitions of n into nonsquares. A87153

Least hypotenuse of n distinct Pythagorean triangles. A6339