71365225 has 6 divisors (see below), whose sum is σ = 88492910. Its totient is φ = 57092160.

The previous prime is 71365207. The next prime is 71365247. The reversal of 71365225 is 52256317.

It can be written as a sum of positive squares in 3 ways, for example, as 670761 + 70694464 = 819^2 + 8408^2 .

It is not a de Polignac number, because 71365225 - 2⁷ = 71365097 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1427280 + ... + 1427329.

Almost surely, 2^71365225 is an apocalyptic number.

It is an amenable number.

71365225 is a deficient number, since it is larger than the sum of its proper divisors (17127685).

71365225 is a wasteful number, since it uses less digits than its factorization.

71365225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2854619 (or 2854614 counting only the distinct ones).

The product of its digits is 12600, while the sum is 31.

The square root of 71365225 is about 8447.7940907671. The cubic root of 71365225 is about 414.7905751294.

The spelling of 71365225 in words is "seventy-one million, three hundred sixty-five thousand, two hundred twenty-five".