71325565 has 8 divisors (see below), whose sum is σ = 85652280. Its totient is φ = 57019392.

The previous prime is 71325559. The next prime is 71325581. The reversal of 71325565 is 56552317.

It can be written as a sum of positive squares in 4 ways, for example, as 580644 + 70744921 = 762^2 + 8411^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 71325565 - 2⁹ = 71325053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71325565.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3981 + ... + 12589.

It is an arithmetic number, because the mean of its divisors is an integer number (10706535).

Almost surely, 2^71325565 is an apocalyptic number.

It is an amenable number.

71325565 is a deficient number, since it is larger than the sum of its proper divisors (14326715).

71325565 is a wasteful number, since it uses less digits than its factorization.

71325565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271.

The product of its digits is 31500, while the sum is 34.

The square root of 71325565 is about 8445.4464062002. The cubic root of 71325565 is about 414.7137233083.

The spelling of 71325565 in words is "seventy-one million, three hundred twenty-five thousand, five hundred sixty-five".