71521068 has 12 divisors (see below), whose sum is σ = 166882520. Its totient is φ = 23840352.

The previous prime is 71521049. The next prime is 71521081. The reversal of 71521068 is 86012517.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2980033 + ... + 2980056.

Almost surely, 2^71521068 is an apocalyptic number.

It is an amenable number.

71521068 is an abundant number, since it is smaller than the sum of its proper divisors (95361452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71521068 is a wasteful number, since it uses less digits than its factorization.

71521068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5960096 (or 5960094 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 71521068 is about 8457.0129478439. The cubic root of 71521068 is about 415.0922870193.

The spelling of 71521068 in words is "seventy-one million, five hundred twenty-one thousand, sixty-eight".