71297225 has 24 divisors (see below), whose sum is σ = 93624960. Its totient is φ = 53766720.

The previous prime is 71297207. The next prime is 71297251. The reversal of 71297225 is 52279217.

It is not a de Polignac number, because 71297225 - 2¹² = 71293129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30032 + ... + 32318.

It is an arithmetic number, because the mean of its divisors is an integer number (3901040).

Almost surely, 2^71297225 is an apocalyptic number.

It is an amenable number.

71297225 is a deficient number, since it is larger than the sum of its proper divisors (22327735).

71297225 is a wasteful number, since it uses less digits than its factorization.

71297225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369 (or 2364 counting only the distinct ones).

The product of its digits is 17640, while the sum is 35.

The square root of 71297225 is about 8443.7684122671. The cubic root of 71297225 is about 414.6587895508.

The spelling of 71297225 in words is "seventy-one million, two hundred ninety-seven thousand, two hundred twenty-five".