71130012 has 12 divisors (see below), whose sum is σ = 165970056. Its totient is φ = 23710000.

The previous prime is 71129917. The next prime is 71130013. The reversal of 71130012 is 21003117.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 71129973 and 71130000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71130013) 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, 2963739 + ... + 2963762.

It is an arithmetic number, because the mean of its divisors is an integer number (13830838).

Almost surely, 2^71130012 is an apocalyptic number.

It is an amenable number.

71130012 is an abundant number, since it is smaller than the sum of its proper divisors (94840044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71130012 is a wasteful number, since it uses less digits than its factorization.

71130012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5927508 (or 5927506 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 71130012 is about 8433.8610375083. The cubic root of 71130012 is about 414.3343701191.

Adding to 71130012 its reverse (21003117), we get a palindrome (92133129).

The spelling of 71130012 in words is "seventy-one million, one hundred thirty thousand, twelve".