6871642 has 4 divisors (see below), whose sum is σ = 10307466. Its totient is φ = 3435820.

The previous prime is 6871639. The next prime is 6871651. The reversal of 6871642 is 2461786.

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., 5574321 + 1297321 = 2361^2 + 1139^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6871598 and 6871607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1717909 + ... + 1717912.

Almost surely, 2^6871642 is an apocalyptic number.

6871642 is a deficient number, since it is larger than the sum of its proper divisors (3435824).

6871642 is a wasteful number, since it uses less digits than its factorization.

6871642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435823.

The product of its digits is 16128, while the sum is 34.

The square root of 6871642 is about 2621.3816967393. The cubic root of 6871642 is about 190.1166596585.

The spelling of 6871642 in words is "six million, eight hundred seventy-one thousand, six hundred forty-two".