6868421 has 16 divisors (see below), whose sum is σ = 8419584. Its totient is φ = 5474304.

The previous prime is 6868403. The next prime is 6868423. The reversal of 6868421 is 1248686.

6868421 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6868421 is a prime.

It is a Duffinian number.

6868421 is strictly pandigital in base 8.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6868423) 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, 5381 + ... + 6533.

It is an arithmetic number, because the mean of its divisors is an integer number (526224).

Almost surely, 2^6868421 is an apocalyptic number.

It is an amenable number.

6868421 is a deficient number, since it is larger than the sum of its proper divisors (1551163).

6868421 is a wasteful number, since it uses less digits than its factorization.

6868421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220.

The product of its digits is 18432, while the sum is 35.

The square root of 6868421 is about 2620.7672540689. The cubic root of 6868421 is about 190.0869500459.

The spelling of 6868421 in words is "six million, eight hundred sixty-eight thousand, four hundred twenty-one".