6921472 has 36 divisors (see below), whose sum is σ = 14553280. Its totient is φ = 3276288.

The previous prime is 6921451. The next prime is 6921493. The reversal of 6921472 is 2741296.

It is an interprime number because it is at equal distance from previous prime (6921451) and next prime (6921493).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4153 + ... + 5575.

Almost surely, 2^6921472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6921472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7276640).

6921472 is an abundant number, since it is smaller than the sum of its proper divisors (7631808).

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

6921472 is a wasteful number, since it uses less digits than its factorization.

6921472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458 (or 1444 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 6921472 is about 2630.8690579350. The cubic root of 6921472 is about 190.5750996144.

The spelling of 6921472 in words is "six million, nine hundred twenty-one thousand, four hundred seventy-two".