6921272 has 8 divisors (see below), whose sum is σ = 12977400. Its totient is φ = 3460632.

The previous prime is 6921247. The next prime is 6921281. The reversal of 6921272 is 2721296.

It is a tau number, because it is divible by the number of its divisors (8).

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432572 + ... + 432587.

It is an arithmetic number, because the mean of its divisors is an integer number (1622175).

Almost surely, 2^6921272 is an apocalyptic number.

It is an amenable number.

6921272 is a deficient number, since it is larger than the sum of its proper divisors (6056128).

6921272 is a wasteful number, since it uses less digits than its factorization.

6921272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865165 (or 865161 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 6921272 is about 2630.8310474069. The cubic root of 6921272 is about 190.5732640036.

Adding to 6921272 its product of digits (3024), we get a palindrome (6924296).

The spelling of 6921272 in words is "six million, nine hundred twenty-one thousand, two hundred seventy-two".