6921072 has 80 divisors (see below), whose sum is σ = 20450080. Its totient is φ = 2239488.

The previous prime is 6921043. The next prime is 6921077. The reversal of 6921072 is 2701296.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6921077) 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, 15768 + ... + 16200.

It is an arithmetic number, because the mean of its divisors is an integer number (255626).

Almost surely, 2^6921072 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 6921072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10225040).

6921072 is an abundant number, since it is smaller than the sum of its proper divisors (13529008).

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

6921072 is a wasteful number, since it uses less digits than its factorization.

6921072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 6921072 is about 2630.7930363295. The cubic root of 6921072 is about 190.5714283574.

It can be divided in two parts, 692 and 1072, that added together give a square (1764 = 42²).

The spelling of 6921072 in words is "six million, nine hundred twenty-one thousand, seventy-two".