71512612 has 24 divisors (see below), whose sum is σ = 133632576. Its totient is φ = 33404448.

The previous prime is 71512607. The next prime is 71512613. The reversal of 71512612 is 21621517.

It is a super-2 number, since 2×71512612² = 10228107350125088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71512613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5083 + ... + 12994.

It is an arithmetic number, because the mean of its divisors is an integer number (5568024).

Almost surely, 2^71512612 is an apocalyptic number.

It is an amenable number.

71512612 is a deficient number, since it is larger than the sum of its proper divisors (62119964).

71512612 is a wasteful number, since it uses less digits than its factorization.

71512612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18147 (or 18145 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 71512612 is about 8456.5129929540. The cubic root of 71512612 is about 415.0759274634.

The spelling of 71512612 in words is "seventy-one million, five hundred twelve thousand, six hundred twelve".