71162138 has 12 divisors (see below), whose sum is σ = 111587658. Its totient is φ = 34033560.

The previous prime is 71162129. The next prime is 71162167. The reversal of 71162138 is 83126117.

It can be written as a sum of positive squares in only one way, i.e., 53831569 + 17330569 = 7337^2 + 4163^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71162138.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32573 + ... + 34688.

Almost surely, 2^71162138 is an apocalyptic number.

71162138 is a deficient number, since it is larger than the sum of its proper divisors (40425520).

71162138 is a wasteful number, since it uses less digits than its factorization.

71162138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67309 (or 67286 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 71162138 is about 8435.7654068851. The cubic root of 71162138 is about 414.3967390224.

The spelling of 71162138 in words is "seventy-one million, one hundred sixty-two thousand, one hundred thirty-eight".