71185012 has 12 divisors (see below), whose sum is σ = 124637380. Its totient is φ = 35574336.

The previous prime is 71184983. The next prime is 71185013. The reversal of 71185012 is 21058117.

It can be written as a sum of positive squares in 2 ways, for example, as 42068196 + 29116816 = 6486^2 + 5396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71185013) 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 3 ways as a sum of consecutive naturals, for example, 8314 + ... + 14542.

Almost surely, 2^71185012 is an apocalyptic number.

It is an amenable number.

71185012 is a deficient number, since it is larger than the sum of its proper divisors (53452368).

71185012 is a wasteful number, since it uses less digits than its factorization.

71185012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9090 (or 9088 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 71185012 is about 8437.1210729727. The cubic root of 71185012 is about 414.4411348010.

The spelling of 71185012 in words is "seventy-one million, one hundred eighty-five thousand, twelve".