Properties of the Number 19625

Nineteen Thousand Six Hundred Twenty-Five

Basics

Value: 19624 → 19625 → 19626

Parity: odd

Prime: No

Previous Prime: 19609

Next Prime: 19661

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 ³ × 157

Divisors: 1, 5, 25, 125, 157, 785, 3925, 19625

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110010101001

Octal: 46251

Duodecimal: B435

Hexadecimal: 4ca9

Square: 385140625

Square Root: 140.089257261219

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

Let p = n-th prime == 3 mod 8; a(n) = (sum of quadratic residues mod p that are < p/2) + (sum of all quadratic residues mod p). A282727

a(0) = 1; a(n) = 5 * ∑_k=1..n binomial(n,k) * a(k-1). A344840

Triangle in which row n lists the numbers of strong vertex magic total labelings of each 2-regular simple graph on 2n+1 vertices. A177741

Number of 4-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero. A208598

Total number of parts of multiplicity 4 in all partitions of n. A222704

Numbers n such that 6·10ⁿ + R_n + 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n. A103027

Decimal expansion of π*e/17. A19625