71040405 has 32 divisors (see below), whose sum is σ = 116660736. Its totient is φ = 36900864.

The previous prime is 71040377. The next prime is 71040419. The reversal of 71040405 is 50404017.

It is not a de Polignac number, because 71040405 - 2¹² = 71036309 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 31 ways as a sum of consecutive naturals, for example, 153204 + ... + 153666.

It is an arithmetic number, because the mean of its divisors is an integer number (3645648).

Almost surely, 2^71040405 is an apocalyptic number.

It is an amenable number.

71040405 is a deficient number, since it is larger than the sum of its proper divisors (45620331).

71040405 is a wasteful number, since it uses less digits than its factorization.

71040405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 71040405 is about 8428.5470278097. The cubic root of 71040405 is about 414.1603092209.

The spelling of 71040405 in words is "seventy-one million, forty thousand, four hundred five".