71305682 has 18 divisors (see below), whose sum is σ = 124567173. Its totient is φ = 30523752.

The previous prime is 71305649. The next prime is 71305687. The reversal of 71305682 is 28650317.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52287361 + 19018321 = 7231^2 + 4361^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5971.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71305687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 83168 + ... + 84020.

Almost surely, 2^71305682 is an apocalyptic number.

71305682 is a deficient number, since it is larger than the sum of its proper divisors (53261491).

71305682 is an frugal number, since it uses more digits than its factorization.

71305682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 71305682 is about 8444.2691809298. The cubic root of 71305682 is about 414.6751839744.

Multiplying 71305682 by its sum of digits (32), we get a square (2281781824 = 47768²).

Adding to 71305682 its reverse (28650317), we get a palindrome (99955999).

The spelling of 71305682 in words is "seventy-one million, three hundred five thousand, six hundred eighty-two".