7211125 has 8 divisors (see below), whose sum is σ = 8999640. Its totient is φ = 5768800.

The previous prime is 7211119. The next prime is 7211129. The reversal of 7211125 is 5211127.

It can be written as a sum of positive squares in 4 ways, for example, as 1129969 + 6081156 = 1063^2 + 2466^2 .

It is not a de Polignac number, because 7211125 - 2⁵ = 7211093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7211129) by changing a digit.

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, 28720 + ... + 28969.

It is an arithmetic number, because the mean of its divisors is an integer number (1124955).

Almost surely, 2^7211125 is an apocalyptic number.

It is an amenable number.

7211125 is a deficient number, since it is larger than the sum of its proper divisors (1788515).

7211125 is an equidigital number, since it uses as much as digits as its factorization.

7211125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57704 (or 57694 counting only the distinct ones).

The product of its digits is 140, while the sum is 19.

The square root of 7211125 is about 2685.3537941955. The cubic root of 7211125 is about 193.1972800878.

The spelling of 7211125 in words is "seven million, two hundred eleven thousand, one hundred twenty-five".