71290012 has 12 divisors (see below), whose sum is σ = 124820640. Its totient is φ = 35626976.

The previous prime is 71290007. The next prime is 71290039. The reversal of 71290012 is 21009217.

It is a congruent number.

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, 8664 + ... + 14752.

It is an arithmetic number, because the mean of its divisors is an integer number (10401720).

Almost surely, 2^71290012 is an apocalyptic number.

It is an amenable number.

71290012 is a deficient number, since it is larger than the sum of its proper divisors (53530628).

71290012 is a wasteful number, since it uses less digits than its factorization.

71290012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9020 (or 9018 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 71290012 is about 8443.3412817439. The cubic root of 71290012 is about 414.6448056745.

Adding to 71290012 its reverse (21009217), we get a palindrome (92299229).

The spelling of 71290012 in words is "seventy-one million, two hundred ninety thousand, twelve".