6863421 has 4 divisors (see below), whose sum is σ = 9151232. Its totient is φ = 4575612.

The previous prime is 6863419. The next prime is 6863443. The reversal of 6863421 is 1243686.

6863421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6863421 - 2¹ = 6863419 is a prime.

It is a D-number.

It is a Duffinian number.

6863421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6863471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143901 + ... + 1143906.

It is an arithmetic number, because the mean of its divisors is an integer number (2287808).

Almost surely, 2^6863421 is an apocalyptic number.

It is an amenable number.

6863421 is a deficient number, since it is larger than the sum of its proper divisors (2287811).

6863421 is a wasteful number, since it uses less digits than its factorization.

6863421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287810.

The product of its digits is 6912, while the sum is 30.

The square root of 6863421 is about 2619.8131612770. The cubic root of 6863421 is about 190.0408130238.

The spelling of 6863421 in words is "six million, eight hundred sixty-three thousand, four hundred twenty-one".