Properties of the Number 81401

Eighty-One Thousand Four Hundred One

Basics

Value: 81400 → 81401 → 81402

Parity: odd

Prime: Yes

Previous Prime: 81373

Next Prime: 81409

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 81401

Divisors: 1, 81401

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110111111001

Octal: 236771

Duodecimal: 3B135

Hexadecimal: 13df9

Square: 6626122801

Square Root: 285.30860484745284

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

Number of cyclic subgroups of the group C_n x C_n x C_n x C_n, where C_n is the cyclic group of order n. A280184

Primes which can be expressed as sum of distinct powers of 5. A77719

Largest prime in the numerator of the 2ⁿ sums generated from the set 1, 1/2, 1/3,..., 1/n. A75226

Sums of 5 distinct powers of 5. A38477

Consider the succession of single digits of the positive even integers: 2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 ... (A036211). This sequence is the lexicographically earliest sequence of distinct positive odd integers that produces the same succession of digits. A97968

1+n²+n³+n⁵+n⁷; 10101101 in base n. A123111

Primes of the form x³+x²+x+2. A88547

Primes whose base-5 representation also is the base-2 representation of a prime. A235462

Primes of the form p³ + p² + p + 2 where p is prime. A347075

Primes p such that there exist primes p'<p"<p"'<p""<p such that the concatenation of any two among the {p,...,p""} is prime. A139005