71138 has 4 divisors (see below), whose sum is σ = 106710. Its totient is φ = 35568.

The previous prime is 71129. The next prime is 71143. The reversal of 71138 is 83117.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 41209 + 29929 = 203^2 + 173^2 .

It is an unprimeable number.

71138 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17783 + ... + 17786.

2⁷¹¹³⁸ is an apocalyptic number.

71138 is a deficient number, since it is larger than the sum of its proper divisors (35572).

71138 is a wasteful number, since it uses less digits than its factorization.

71138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35571.

The product of its digits is 168, while the sum is 20.

The square root of 71138 is about 266.7170785683. The cubic root of 71138 is about 41.4349879649.

The spelling of 71138 in words is "seventy-one thousand, one hundred thirty-eight".