6856542 has 128 divisors (see below), whose sum is σ = 20321280. Its totient is φ = 1658880.

The previous prime is 6856537. The next prime is 6856543. The reversal of 6856542 is 2456586.

6856542 is a `hidden beast` number, since 68 + 56 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 6856497 and 6856506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856543) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70638 + ... + 70734.

It is an arithmetic number, because the mean of its divisors is an integer number (158760).

Almost surely, 2^6856542 is an apocalyptic number.

It is a pronic number, being equal to 2618×2619.

It is a practical number, because each smaller number is the sum of distinct divisors of 6856542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10160640).

6856542 is an abundant number, since it is smaller than the sum of its proper divisors (13464738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6856542 is a wasteful number, since it uses less digits than its factorization.

6856542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 137 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 6856542 is about 2618.4999522627. The cubic root of 6856542 is about 189.9773010741.

It can be divided in two parts, 685 and 6542, that added together give a palindrome (7227).

The spelling of 6856542 in words is "six million, eight hundred fifty-six thousand, five hundred forty-two".