871634 has 4 divisors (see below), whose sum is σ = 1307454.
Its totient is φ = 435816.
The previous prime is 871621. The next prime is 871639. The reversal of 871634 is 436178.
871634 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., 714025 + 157609 = 845^2 + 397^2
It is a plaindrome in base 15.
It is a junction number, because it is equal to n+sod(n) for n = 871597 and 871606.
It is not an unprimeable number, because it can be changed into a prime (871639) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217907 + ... + 217910.
2871634 is an apocalyptic number.
871634 is a deficient number, since it is larger than the sum of its proper divisors (435820).
871634 is a wasteful number, since it uses less digits than its factorization.
871634 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 435819.
The product of its digits is 4032, while the sum is 29.
The square root of 871634 is about 933.6134103578.
The cubic root of 871634 is about 95.5237553178.
The spelling of 871634 in words is "eight hundred seventy-one thousand, six hundred thirty-four".