71040205 has 8 divisors (see below), whose sum is σ = 86031000. Its totient is φ = 56310336.

The previous prime is 71040187. The next prime is 71040217. The reversal of 71040205 is 50204017.

It can be written as a sum of positive squares in 4 ways, for example, as 4748041 + 66292164 = 2179^2 + 8142^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71040205 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 64630 + ... + 65719.

It is an arithmetic number, because the mean of its divisors is an integer number (10753875).

Almost surely, 2^71040205 is an apocalyptic number.

It is an amenable number.

71040205 is a deficient number, since it is larger than the sum of its proper divisors (14990795).

71040205 is a wasteful number, since it uses less digits than its factorization.

71040205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130463.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 71040205 is about 8428.5351633602. The cubic root of 71040205 is about 414.1599205588.

The spelling of 71040205 in words is "seventy-one million, forty thousand, two hundred five".