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71287 is a prime number
BaseRepresentation
bin10001011001110111
310121210021
4101121313
54240122
61310011
7414556
oct213167
9117707
1071287
1149617
1235307
13265a8
141bd9d
15161c7
hex11677

71287 has 2 divisors, whose sum is σ = 71288. Its totient is φ = 71286.

The previous prime is 71263. The next prime is 71293. The reversal of 71287 is 78217.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71287 - 211 = 69239 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 71287.

It is not a weakly prime, because it can be changed into another prime (71237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35643 + 35644.

It is an arithmetic number, because the mean of its divisors is an integer number (35644).

271287 is an apocalyptic number.

71287 is a deficient number, since it is larger than the sum of its proper divisors (1).

71287 is an equidigital number, since it uses as much as digits as its factorization.

71287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 784, while the sum is 25.

The square root of 71287 is about 266.9962546554. The cubic root of 71287 is about 41.4638966017.

It can be divided in two parts, 7 and 1287, that multiplied together give a palindrome (9009).

The spelling of 71287 in words is "seventy-one thousand, two hundred eighty-seven".