71565725 has 72 divisors (see below), whose sum is σ = 116028288. Its totient is φ = 43276800.

The previous prime is 71565721. The next prime is 71565731. The reversal of 71565725 is 52756517.

It is not a de Polignac number, because 71565725 - 2² = 71565721 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 (71565721) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 633269 + ... + 633381.

It is an arithmetic number, because the mean of its divisors is an integer number (1611504).

Almost surely, 2^71565725 is an apocalyptic number.

It is an amenable number.

71565725 is a deficient number, since it is larger than the sum of its proper divisors (44462563).

71565725 is a wasteful number, since it uses less digits than its factorization.

71565725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 183 counting only the distinct ones).

The product of its digits is 73500, while the sum is 38.

The square root of 71565725 is about 8459.6527706520. The cubic root of 71565725 is about 415.1786621255.

The spelling of 71565725 in words is "seventy-one million, five hundred sixty-five thousand, seven hundred twenty-five".