Properties of the Number 7841

Seven Thousand Eight Hundred Forty-One

Basics

Value: 7840 → 7841 → 7842

Parity: odd

Prime: Yes

Previous Prime: 7829

Next Prime: 7853

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7841

Divisors: 1, 7841

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111010100001

Octal: 17241

Duodecimal: 4655

Hexadecimal: 1ea1

Square: 61481281

Square Root: 88.54942122905152

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: Yes

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Primes with indices that are primes with prime indices. A38580

E.g.f.: exp(x/(1+x)). A111884

Numbers that are the sum of 6 nonzero 8th powers. A3384

Number of integer partitions of n with no part dividing all the others. A338470

Primes prime(k) for which A049076(k) = 3. A49079

Primes which are the concatenation of two squares (in decimal notation). A167535

Number of series-reduced rooted trees with n nodes. A1679

Primes p such that the multiplicative order of 2 modulo p is (p-1)/4. A1134

a(n) = prime(R(prime(n))) where prime(i) is the i-th prime and R(p) is the value of the reverse of the digits of p. A124179

a(n) = prime(n*(n+1)/2 + 1). A78721