71199912 has 64 divisors (see below), whose sum is σ = 204433920. Its totient is φ = 20242368.

The previous prime is 71199899. The next prime is 71199913. The reversal of 71199912 is 21999117.

It is not an unprimeable number, because it can be changed into a prime (71199913) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 37203 + ... + 39069.

It is an arithmetic number, because the mean of its divisors is an integer number (3194280).

Almost surely, 2^71199912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71199912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102216960).

71199912 is an abundant number, since it is smaller than the sum of its proper divisors (133234008).

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

71199912 is a wasteful number, since it uses less digits than its factorization.

71199912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110 (or 2106 counting only the distinct ones).

The product of its digits is 10206, while the sum is 39.

The square root of 71199912 is about 8438.0040293899. The cubic root of 71199912 is about 414.4700488563.

The spelling of 71199912 in words is "seventy-one million, one hundred ninety-nine thousand, nine hundred twelve".