71239072 has 12 divisors (see below), whose sum is σ = 140251986. Its totient is φ = 35619520.

The previous prime is 71239067. The next prime is 71239079. The reversal of 71239072 is 27093217.

It can be written as a sum of positive squares in only one way, i.e., 64705936 + 6533136 = 8044^2 + 2556^2 .

It is not an unprimeable number, because it can be changed into a prime (71239079) by changing a digit.

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 as a sum of consecutive naturals, namely, 1113079 + ... + 1113142.

Almost surely, 2^71239072 is an apocalyptic number.

It is an amenable number.

71239072 is a deficient number, since it is larger than the sum of its proper divisors (69012914).

71239072 is a wasteful number, since it uses less digits than its factorization.

71239072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226231 (or 2226223 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 71239072 is about 8440.3241643908. The cubic root of 71239072 is about 414.5460211992.

The spelling of 71239072 in words is "seventy-one million, two hundred thirty-nine thousand, seventy-two".