71111085 has 16 divisors (see below), whose sum is σ = 120470976. Its totient is φ = 35694848.

The previous prime is 71111081. The next prime is 71111087. The reversal of 71111085 is 58011117.

It is a cyclic number.

It is not a de Polignac number, because 71111085 - 2² = 71111081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71111081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139179 + ... + 139688.

It is an arithmetic number, because the mean of its divisors is an integer number (7529436).

Almost surely, 2^71111085 is an apocalyptic number.

It is an amenable number.

71111085 is a deficient number, since it is larger than the sum of its proper divisors (49359891).

71111085 is a wasteful number, since it uses less digits than its factorization.

71111085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278892.

The product of its (nonzero) digits is 280, while the sum is 24.

The square root of 71111085 is about 8432.7388789171. The cubic root of 71111085 is about 414.2976167522.

It can be divided in two parts, 71 and 111085, that added together give a triangular number (111156 = T₄₇₁).

The spelling of 71111085 in words is "seventy-one million, one hundred eleven thousand, eighty-five".