6820542 has 12 divisors (see below), whose sum is σ = 14777880. Its totient is φ = 2273508.

The previous prime is 6820537. The next prime is 6820547. The reversal of 6820542 is 2450286.

It is an interprime number because it is at equal distance from previous prime (6820537) and next prime (6820547).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 189442 + ... + 189477.

It is an arithmetic number, because the mean of its divisors is an integer number (1231490).

Almost surely, 2^6820542 is an apocalyptic number.

6820542 is an abundant number, since it is smaller than the sum of its proper divisors (7957338).

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

6820542 is a wasteful number, since it uses less digits than its factorization.

6820542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378927 (or 378924 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 6820542 is about 2611.6167406417. The cubic root of 6820542 is about 189.6442280520.

The spelling of 6820542 in words is "six million, eight hundred twenty thousand, five hundred forty-two".