871138 has 4 divisors (see below), whose sum is σ = 1306710. Its totient is φ = 435568.

The previous prime is 871103. The next prime is 871147. The reversal of 871138 is 831178.

It is a happy number.

871138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 700569 + 170569 = 837^2 + 413^2 .

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217783 + ... + 217786.

2⁸⁷¹¹³⁸ is an apocalyptic number.

871138 is a deficient number, since it is larger than the sum of its proper divisors (435572).

871138 is a wasteful number, since it uses less digits than its factorization.

871138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435571.

The product of its digits is 1344, while the sum is 28.

The square root of 871138 is about 933.3477379841. The cubic root of 871138 is about 95.5056327370.

It can be divided in two parts, 87 and 1138, that added together give a triangular number (1225 = T₄₉).

The spelling of 871138 in words is "eight hundred seventy-one thousand, one hundred thirty-eight".