71321156 has 6 divisors (see below), whose sum is σ = 124812030. Its totient is φ = 35660576.

The previous prime is 71321149. The next prime is 71321161. The reversal of 71321156 is 65112317.

It can be written as a sum of positive squares in only one way, i.e., 57002500 + 14318656 = 7550^2 + 3784^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8915141 + ... + 8915148.

It is an arithmetic number, because the mean of its divisors is an integer number (20802005).

Almost surely, 2^71321156 is an apocalyptic number.

It is an amenable number.

71321156 is a deficient number, since it is larger than the sum of its proper divisors (53490874).

71321156 is a wasteful number, since it uses less digits than its factorization.

71321156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17830293 (or 17830291 counting only the distinct ones).

The product of its digits is 1260, while the sum is 26.

The square root of 71321156 is about 8445.1853739276. The cubic root of 71321156 is about 414.7051779362.

The spelling of 71321156 in words is "seventy-one million, three hundred twenty-one thousand, one hundred fifty-six".