871370642 has 4 divisors (see below), whose sum is σ = 1307055966. Its totient is φ = 435685320.

The previous prime is 871370641. The next prime is 871370651. The reversal of 871370642 is 246073178.

871370642 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., 541911841 + 329458801 = 23279^2 + 18151^2 .

It is a junction number, because it is equal to n+sod(n) for n = 871370596 and 871370605.

It is not an unprimeable number, because it can be changed into a prime (871370641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217842659 + ... + 217842662.

Almost surely, 2^871370642 is an apocalyptic number.

871370642 is a deficient number, since it is larger than the sum of its proper divisors (435685324).

871370642 is a wasteful number, since it uses less digits than its factorization.

871370642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435685323.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 871370642 is about 29518.9878214007. The cubic root of 871370642 is about 955.1413374141.

The spelling of 871370642 in words is "eight hundred seventy-one million, three hundred seventy thousand, six hundred forty-two".