71257612 has 6 divisors (see below), whose sum is σ = 124700828. Its totient is φ = 35628804.

The previous prime is 71257607. The next prime is 71257633. The reversal of 71257612 is 21675217.

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 as a sum of consecutive naturals, namely, 8907198 + ... + 8907205.

Almost surely, 2^71257612 is an apocalyptic number.

It is an amenable number.

71257612 is a deficient number, since it is larger than the sum of its proper divisors (53443216).

71257612 is a wasteful number, since it uses less digits than its factorization.

71257612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17814407 (or 17814405 counting only the distinct ones).

The product of its digits is 5880, while the sum is 31.

The square root of 71257612 is about 8441.4223919906. The cubic root of 71257612 is about 414.5819800084.

The spelling of 71257612 in words is "seventy-one million, two hundred fifty-seven thousand, six hundred twelve".