Properties of the Number 19025

Nineteen Thousand Twenty-Five

Basics

Value: 19024 → 19025 → 19026

Parity: odd

Prime: No

Previous Prime: 19013

Next Prime: 19031

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 ² × 761

Divisors: 1, 5, 25, 761, 3805, 19025

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101001010001

Octal: 45121

Duodecimal: B015

Hexadecimal: 4a51

Square: 361950625

Square Root: 137.93114224133723

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

Least k such that ∑_i=1..k (prime(i) + prime(i+2) - 2·prime(i+1)) = 2n + 1. A73051

Numbers k such that the k-th maximal run of composite numbers has length different from all prior maximal runs. Sorted positions of first appearances in A176246 (or A046933 shifted). A373400

Number of 11-regular partitions of n (no part is a multiple of 11). A328545

a(n) = smallest k with concat(1,k) and concat(n,k) both square numbers. A265432

Expansion of e.g.f. exp(x * (1-3·x)). A362177

Numbers m such that the decimal number concat(8,m) is a square. A273363

Dirichlet convolution of A133494 [3^n-1] with A349452 (Dirichlet inverse of A011782, 2^n-1). A349567

a(n) = smallest m such that A031131(m) = 2·n. A261525

a(n) is the number of edges formed by n-secting the angles of a pentagon. A335555

Triangle read by rows: T(n,k) = 4·T(n-1,k-1) + T(n,k-1) with T(2·m,0) = 0 and T(2·m+1,0) = 5^m. A292466