Properties of the Number 42818

Forty-Two Thousand Eight Hundred Eighteen

Basics

Value: 42817 → 42818 → 42819

Parity: even

Prime: No

Previous Prime: 42797

Next Prime: 42821

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 79 × 271

Divisors: 1, 2, 79, 158, 271, 542, 21409, 42818

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1010011101000010

Octal: 123502

Duodecimal: 20942

Hexadecimal: a742

Square: 1833381124

Square Root: 206.92510722481214

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

Numbers k such that k and k+1 have same sum of divisors. A2961

Numbers k such that bsigma(k) = bsigma(k+1), where bsigma(k) is the sum of the bi-unitary divisors of k (A188999). A293183

Numbers k such that isigma(k) = isigma(k+1), where isigma(k) is the sum of the infinitary divisors of k (A049417). A306985

Numbers k such that k and k+1 have the same number and sum of divisors. A54004

Numbers k such that σ(k+1) divides σ(k), where σ(k) is the sum of positive divisors of k. A58073

Numbers k such that the average of the divisors of k and k+1 is the same. A238380

Numbers k such that σ(k) divides σ(k+1), where σ(k) is sum of positive divisors of k. A58072

a(n) = (binomial(2n, n) - 2) mod n³. A246133

Numbers n such that σ(n+1) - σ(n) = k·n for some integer k, where σ(n) = A000203 (sum of divisors of n). A223136

Table of consecutive numbers with the same sum of divisors. A225757