Properties of the Number 1925

One Thousand Nine Hundred Twenty-Five

Basics

Value: 1924 → 1925 → 1926

Parity: odd

Prime: No

Previous Prime: 1913

Next Prime: 1931

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 ² × 7 × 11

Divisors: 1, 5, 7, 11, 25, 35, 55, 77, 175, 275

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 11110000101

Octal: 3605

Duodecimal: 1145

Hexadecimal: 785

Square: 3705625

Square Root: 43.87482193696061

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

Numbers k that divide the (right) concatenation of all numbers <= k written in base 25 (most significant digit on left). A29470

Generalized octagonal numbers: k*(3·k-2), k=0, +- 1, +- 2, +-3, ... A1082

Hexagonal pyramidal numbers, or greengrocer's numbers. A2412

Expansion of 1/((1-x)⁴*(1+x)). A2623

Rhombic matchstick numbers: a(n) = n*(3·n+2). A45944

Number of partitions of n where n divides the product of the parts. A57568

Stirling numbers of the first kind: s(n+2, n). A914

Number of strict partitions of 2n that include a partition of n. A237258

Triangle read by rows: T(n, k) is the number of diagonal dissections of a convex n-gon into k+1 regions. A33282

a(n) = (3·n² - n - 2)/2. A115067