71005039 has 16 divisors (see below), whose sum is σ = 86151168. Its totient is φ = 57128832.

The previous prime is 71005027. The next prime is 71005057. The reversal of 71005039 is 93050017.

It is a cyclic number.

It is not a de Polignac number, because 71005039 - 2²⁵ = 37450607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71005009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71742 + ... + 72724.

It is an arithmetic number, because the mean of its divisors is an integer number (5384448).

Almost surely, 2^71005039 is an apocalyptic number.

71005039 is a deficient number, since it is larger than the sum of its proper divisors (15146129).

71005039 is a wasteful number, since it uses less digits than its factorization.

71005039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 71005039 is about 8426.4487775100. The cubic root of 71005039 is about 414.0915707578.

The spelling of 71005039 in words is "seventy-one million, five thousand, thirty-nine".