Properties of the Number 42774

Forty-Two Thousand Seven Hundred Seventy-Four

Basics

Value: 42773 → 42774 → 42775

Parity: even

Prime: No

Previous Prime: 42773

Next Prime: 42787

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 7129

Divisors: 1, 2, 3, 6, 7129, 14258, 21387, 42774

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011100010110

Octal: 123426

Duodecimal: 20906

Hexadecimal: a716

Square: 1829615076

Square Root: 206.8187612379496

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

Number T(n, k) of ways to place k points on an n X n X n triangular grid so that no pair of them has distance sqrt(3). Triangle read by rows. A244500

a(n) = H(n)*n!/(floor(n/2))!, where H(n) = ∑_k=1..n 1/k, the n-th harmonic number. A124078

a(n) = H(2n+1)*(2n+1)!/n!, where H(n) = ∑_k=1..n 1/k, the n-th harmonic number. A124079

Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with every one adjacent to exactly 2 other ones. A153987

Integers k such that A014841(k) = A014841(k+1). A356961

Numerators of continued fraction convergents to sqrt(918). A42774