6868521 has 12 divisors (see below), whose sum is σ = 10823280. Its totient is φ = 4162680.

The previous prime is 6868517. The next prime is 6868523. The reversal of 6868521 is 1258686.

It is a happy number.

It is not a de Polignac number, because 6868521 - 2² = 6868517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6868523) 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 11 ways as a sum of consecutive naturals, for example, 34591 + ... + 34788.

It is an arithmetic number, because the mean of its divisors is an integer number (901940).

Almost surely, 2^6868521 is an apocalyptic number.

It is an amenable number.

6868521 is a deficient number, since it is larger than the sum of its proper divisors (3954759).

6868521 is a wasteful number, since it uses less digits than its factorization.

6868521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69396 (or 69393 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 6868521 is about 2620.7863323819. The cubic root of 6868521 is about 190.0878725579.

The spelling of 6868521 in words is "six million, eight hundred sixty-eight thousand, five hundred twenty-one".