71248812 has 12 divisors (see below), whose sum is σ = 166247256. Its totient is φ = 23749600.

The previous prime is 71248799. The next prime is 71248847. The reversal of 71248812 is 21884217.

It is a happy number.

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

It is a super-2 number, since 2×71248812² = 10152786422822688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2968689 + ... + 2968712.

It is an arithmetic number, because the mean of its divisors is an integer number (13853938).

Almost surely, 2^71248812 is an apocalyptic number.

It is an amenable number.

71248812 is an abundant number, since it is smaller than the sum of its proper divisors (94998444).

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

71248812 is a wasteful number, since it uses less digits than its factorization.

71248812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5937408 (or 5937406 counting only the distinct ones).

The product of its digits is 7168, while the sum is 33.

The square root of 71248812 is about 8440.9011367270. The cubic root of 71248812 is about 414.5649129587.

The spelling of 71248812 in words is "seventy-one million, two hundred forty-eight thousand, eight hundred twelve".