Properties of the Number 42978

Forty-Two Thousand Nine Hundred Seventy-Eight

Basics

Value: 42977 → 42978 → 42979

Parity: even

Prime: No

Previous Prime: 42967

Next Prime: 42979

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 13 × 19 × 29

Divisors: 1, 2, 3, 6, 13, 19, 26, 29, 38, 39

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1010011111100010

Octal: 123742

Duodecimal: 20A56

Hexadecimal: a7e2

Square: 1847108484

Square Root: 207.31136003605783

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

First term of A175304 with a given prime signature. A282231

a(n) is the smallest product M=p₁*p₂*...*p_n with distinct primes p_i such that M+2ⁿ=B, where B=q₁*q₂*...*q_n with distinct primes q_i, or a(n)=0 if there is no such M. A282175

Sum of the areas of the distinct rectangles (and the areas of the squares on their sides) with positive integer sides such that L + W = n, W < L. A294139

G.f. A(x) satisfies A(x) = (1 + x·A(x))² * (1 + A(x)) / 2. A228966

Stern primes: primes not of the form p + 2b² for p prime and b > 0. A42978