71085412 has 6 divisors (see below), whose sum is σ = 124399478. Its totient is φ = 35542704.

The previous prime is 71085401. The next prime is 71085419. The reversal of 71085412 is 21458017.

It can be written as a sum of positive squares in only one way, i.e., 52215076 + 18870336 = 7226^2 + 4344^2 .

It is not an unprimeable number, because it can be changed into a prime (71085419) 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, 8885673 + ... + 8885680.

Almost surely, 2^71085412 is an apocalyptic number.

It is an amenable number.

71085412 is a deficient number, since it is larger than the sum of its proper divisors (53314066).

71085412 is a wasteful number, since it uses less digits than its factorization.

71085412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17771357 (or 17771355 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 71085412 is about 8431.2165195777. The cubic root of 71085412 is about 414.2477532513.

The spelling of 71085412 in words is "seventy-one million, eighty-five thousand, four hundred twelve".