Properties of the Number 42486

Forty-Two Thousand Four Hundred Eighty-Six

Basics

Value: 42485 → 42486 → 42487

Parity: even

Prime: No

Previous Prime: 42473

Next Prime: 42487

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 73 × 97

Divisors: 1, 2, 3, 6, 73, 97, 146, 194, 219, 291

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010111110110

Octal: 122766

Duodecimal: 20706

Hexadecimal: a5f6

Square: 1805060196

Square Root: 206.1213234966242

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

a(n) is the smallest m for which the decimal representation of 2^m contains n consecutive identical digits. A45875

Triangular numbers that are palindromes in base 9. A350993

Numbers k such that 12^k == -1 (mod k-1). A55695

Triangular numbers with only even digits. A117978

Exponent of least power of 2 having exactly n consecutive 9's in its decimal representation. A131543

Squarefree n such that the elliptic curve n·y² = x³ - x arising in the "congruent number" problem has rank 3 and nontrivial SHA[2]. A62694

Hexagonal numbers (A000384) which are sum of 2 other hexagonal numbers > 0. A133215

Triangular numbers whose sum of squared digits is also triangular. A94890

a(n) = m*(m+1)/2, where m = floor(n^3/2). A185541

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 137", based on the 5-celled von Neumann neighborhood. A270276