6721275 has 24 divisors (see below), whose sum is σ = 12124224. Its totient is φ = 3258400.

The previous prime is 6721259. The next prime is 6721277. The reversal of 6721275 is 5721276.

It is not a de Polignac number, because 6721275 - 2⁴ = 6721259 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6721277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3249 + ... + 4898.

It is an arithmetic number, because the mean of its divisors is an integer number (505176).

Almost surely, 2^6721275 is an apocalyptic number.

6721275 is a deficient number, since it is larger than the sum of its proper divisors (5402949).

6721275 is a wasteful number, since it uses less digits than its factorization.

6721275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8171 (or 8166 counting only the distinct ones).

The product of its digits is 5880, while the sum is 30.

The square root of 6721275 is about 2592.5421886635. The cubic root of 6721275 is about 188.7196931005.

Subtracting from 6721275 its reverse (5721276), we obtain a palindrome (999999).

It can be divided in two parts, 6721 and 275, that added together give a palindrome (6996).

The spelling of 6721275 in words is "six million, seven hundred twenty-one thousand, two hundred seventy-five".