6856642 has 32 divisors (see below), whose sum is σ = 11741184. Its totient is φ = 2980800.

The previous prime is 6856631. The next prime is 6856643. The reversal of 6856642 is 2466586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37792 + ... + 37972.

It is an arithmetic number, because the mean of its divisors is an integer number (366912).

Almost surely, 2^6856642 is an apocalyptic number.

6856642 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6856642 is a deficient number, since it is larger than the sum of its proper divisors (4884542).

6856642 is a wasteful number, since it uses less digits than its factorization.

6856642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274.

The product of its digits is 69120, while the sum is 37.

The square root of 6856642 is about 2618.5190470951. The cubic root of 6856642 is about 189.9782246513.

The spelling of 6856642 in words is "six million, eight hundred fifty-six thousand, six hundred forty-two".