Properties of the Number -420419

Four Hundred Twenty Thousand Four Hundred Nineteen

Basics

Value: -420420 → -420419 → -420418

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 420419

Divisors: 1, 420419

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1100110101001000011

Octal: -1465103

Duodecimal: -18336B

Hexadecimal: -66a43

Square: 176752135561

Square Root: 648.397254775188

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 n such that n, 2n+1, 3n+2, 4n+3, 5n+4 are primes. A67258

Smaller of twin primes of the form P=j·P(i)#-1 and P=j·P(i)#+1 with 0 < j < P(i+1), where P(i) denotes i-th prime and P(i)# the i-th primorial number A002110(i). A87732

Smaller of twin primes whose mean (average) is a multiple of A002110(6)=30030. A60232

Numbers k where records occur for φ(k)/φ(k+1), where φ is the Euler totient function (A000010). A335070

Numbers k such that φ(σ(k))/k < φ(σ(m))/m for all m < k, where σ is the sum of divisors function (A000203) and φ is Euler's totient function (A000010). A293711

Numbers k such that φ(ψ(k))/k < φ(ψ(m))/m for all m < k, where φ is Euler's totient function (A000010) and ψ is the Dedekind ψ function (A001615). A293713

Prime-indexed primes p such that 2·p + 1 is also a prime-indexed prime. A318294

Safe primes that are also highly cototient numbers. A209193

Sophie Germain primes that are also highly cototient numbers. A209194