71390212 has 12 divisors (see below), whose sum is σ = 125632080. Its totient is φ = 35495336.

The previous prime is 71390203. The next prime is 71390213. The reversal of 71390212 is 21209317.

It is not an unprimeable number, because it can be changed into a prime (71390213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49138 + ... + 50569.

It is an arithmetic number, because the mean of its divisors is an integer number (10469340).

Almost surely, 2^71390212 is an apocalyptic number.

It is an amenable number.

71390212 is a deficient number, since it is larger than the sum of its proper divisors (54241868).

71390212 is a wasteful number, since it uses less digits than its factorization.

71390212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99890 (or 99888 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 71390212 is about 8449.2728681230. The cubic root of 71390212 is about 414.8389794829.

Adding to 71390212 its reverse (21209317), we get a palindrome (92599529).

The spelling of 71390212 in words is "seventy-one million, three hundred ninety thousand, two hundred twelve".