Properties of the Number 42798

Forty-Two Thousand Seven Hundred Ninety-Eight

Basics

Value: 42797 → 42798 → 42799

Parity: even

Prime: No

Previous Prime: 42797

Next Prime: 42821

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 × 1019

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 1019, 2038

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011100101110

Octal: 123456

Duodecimal: 20926

Hexadecimal: a72e

Square: 1831668804

Square Root: 206.87677491685722

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

Take the first n numbers written in base 8, concatenate them, then convert from base 8 to base 10. A48440

a(1)=1; for n>1, a(n) = 8·a(n-1) + n. A14831

a(n) = ∑_d∣n sigma₃(d). A321140

a(n) = A002704(n)-2. A262583

Expansion of 1/sqrt((1-7·x)³ * (1+x)). A383944

The first n digits of the juxtaposition of the base-8 numbers converted to decimal. A55149

Triangle T(n,k) read by rows: T(n,k) = (n-k+1)*T(n-1,k-1) + (3·k-2)*k·T(n-1,k), initialized by T(n,1) = T(n,n) = 1. A166972

Least k such that the difference between consecutive 3-almost primes A014612(k) equals n, or 0 if no such k exists. A131939

T(n,k) = n·T(n,k-1) + k, with T(n,1) = 1, square array read by ascending antidiagonals (n >= 0, k >= 1). A126885

Numerators of continued fraction convergents to sqrt(930). A42798