71320612 has 12 divisors (see below), whose sum is σ = 136157616. Its totient is φ = 32418440.

The previous prime is 71320609. The next prime is 71320619. The reversal of 71320612 is 21602317.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (71320619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810418 + ... + 810505.

It is an arithmetic number, because the mean of its divisors is an integer number (11346468).

Almost surely, 2^71320612 is an apocalyptic number.

It is an amenable number.

71320612 is a deficient number, since it is larger than the sum of its proper divisors (64837004).

71320612 is a wasteful number, since it uses less digits than its factorization.

71320612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620938 (or 1620936 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 71320612 is about 8445.1531661658. The cubic root of 71320612 is about 414.7041235497.

Adding to 71320612 its reverse (21602317), we get a palindrome (92922929).

The spelling of 71320612 in words is "seventy-one million, three hundred twenty thousand, six hundred twelve".