71286 has 12 divisors (see below), whose sum is σ = 143892. Its totient is φ = 23544.

The previous prime is 71263. The next prime is 71287. The reversal of 71286 is 68217.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71287) by changing a digit.

71286 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 600 + ... + 708.

It is an arithmetic number, because the mean of its divisors is an integer number (11991).

2⁷¹²⁸⁶ is an apocalyptic number.

71286 is an abundant number, since it is smaller than the sum of its proper divisors (72606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71946).

71286 is a wasteful number, since it uses less digits than its factorization.

71286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 114 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 71286 is about 266.9943819634. The cubic root of 71286 is about 41.4637027183.

Multiplying 71286 by its sum of digits (24), we get a square (1710864 = 1308²).

The spelling of 71286 in words is "seventy-one thousand, two hundred eighty-six".