6921230 has 16 divisors (see below), whose sum is σ = 12517200. Its totient is φ = 2755392.

The previous prime is 6921223. The next prime is 6921247. The reversal of 6921230 is 321296.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 6921196 and 6921205.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 746 + ... + 3794.

It is an arithmetic number, because the mean of its divisors is an integer number (782325).

Almost surely, 2^6921230 is an apocalyptic number.

6921230 is a deficient number, since it is larger than the sum of its proper divisors (5595970).

6921230 is a wasteful number, since it uses less digits than its factorization.

6921230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 6921230 is about 2630.8230651262. The cubic root of 6921230 is about 190.5728785208.

The spelling of 6921230 in words is "six million, nine hundred twenty-one thousand, two hundred thirty".