71912 has 16 divisors (see below), whose sum is σ = 137700. Its totient is φ = 35200.

The previous prime is 71909. The next prime is 71917. The reversal of 71912 is 21917.

It can be written as a sum of positive squares in 2 ways, for example, as 70756 + 1156 = 266^2 + 34^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (71917) 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, 662 + ... + 762.

2⁷¹⁹¹² is an apocalyptic number.

It is an amenable number.

71912 is a deficient number, since it is larger than the sum of its proper divisors (65788).

71912 is a wasteful number, since it uses less digits than its factorization.

71912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 192 counting only the distinct ones).

The product of its digits is 126, while the sum is 20.

The square root of 71912 is about 268.1641288465. The cubic root of 71912 is about 41.5847207201.

The spelling of 71912 in words is "seventy-one thousand, nine hundred twelve".