71289025 has 6 divisors (see below), whose sum is σ = 88398422. Its totient is φ = 57031200.

The previous prime is 71289019. The next prime is 71289061. The reversal of 71289025 is 52098217.

It can be written as a sum of positive squares in 3 ways, for example, as 8625969 + 62663056 = 2937^2 + 7916^2 .

It is not a de Polignac number, because 71289025 - 2³ = 71289017 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 1425756 + ... + 1425805.

Almost surely, 2^71289025 is an apocalyptic number.

It is an amenable number.

71289025 is a deficient number, since it is larger than the sum of its proper divisors (17109397).

71289025 is a wasteful number, since it uses less digits than its factorization.

71289025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851571 (or 2851566 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 71289025 is about 8443.2828331165. The cubic root of 71289025 is about 414.6428920997.

The spelling of 71289025 in words is "seventy-one million, two hundred eighty-nine thousand, twenty-five".