71087012 has 6 divisors (see below), whose sum is σ = 124402278. Its totient is φ = 35543504.

The previous prime is 71087011. The next prime is 71087069. The reversal of 71087012 is 21078017.

It can be written as a sum of positive squares in only one way, i.e., 58583716 + 12503296 = 7654^2 + 3536^2 .

It is not an unprimeable number, because it can be changed into a prime (71087011) 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 as a sum of consecutive naturals, namely, 8885873 + ... + 8885880.

It is an arithmetic number, because the mean of its divisors is an integer number (20733713).

Almost surely, 2^71087012 is an apocalyptic number.

It is an amenable number.

71087012 is a deficient number, since it is larger than the sum of its proper divisors (53315266).

71087012 is a wasteful number, since it uses less digits than its factorization.

71087012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17771757 (or 17771755 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 71087012 is about 8431.3114045207. The cubic root of 71087012 is about 414.2508612093.

The spelling of 71087012 in words is "seventy-one million, eighty-seven thousand, twelve".