Properties of the Number -1642154

Six Hundred Forty-Two Thousand One Hundred Fifty-Four

Basics

Value: -1642155 → -1642154 → -1642153

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 23 × 29 × 1231

Divisors: 1, 2, 23, 29, 46, 58, 667, 1231, 1334, 2462

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110010000111010101010

Octal: -6207252

Duodecimal: -6723A2

Hexadecimal: -190eaa

Square: 2696669759716

Square Root: 1281.4655672315196

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 the same number and sum of divisors. A54004

Numbers k such that k and k+1 have the same sum of unitary and nonunitary divisors. A64729

Numbers k such that A065608(k) = A065608(k+1). A65062

Numbers k such that sigmawt(k) = sigmawt(k+1), where sigmawt(k) is the sum of the divisors of k weighted by divisor multiplicity in k. A171183

Numbers k such that t(k) = t(k+1) where t(k) = τ(k) + σ(k) = A007503(k) is the number of subgroups of the dihedral group of order 2k. A322256

Numbers n such that ∏_d∣n σ(d) = ∏_d∣n+1 σ(d). A280087