71321956 has 12 divisors (see below), whose sum is σ = 124875520. Its totient is φ = 35643240.

The previous prime is 71321951. The next prime is 71321959. The reversal of 71321956 is 65912317.

It is not an unprimeable number, because it can be changed into a prime (71321951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9421 + ... + 15211.

Almost surely, 2^71321956 is an apocalyptic number.

It is an amenable number.

71321956 is a deficient number, since it is larger than the sum of its proper divisors (53553564).

71321956 is a wasteful number, since it uses less digits than its factorization.

71321956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8874 (or 8872 counting only the distinct ones).

The product of its digits is 11340, while the sum is 34.

The square root of 71321956 is about 8445.2327380600. The cubic root of 71321956 is about 414.7067284948.

The spelling of 71321956 in words is "seventy-one million, three hundred twenty-one thousand, nine hundred fifty-six".