9191225 has 6 divisors (see below), whose sum is σ = 11397150. Its totient is φ = 7352960.

The previous prime is 9191201. The next prime is 9191227. The reversal of 9191225 is 5221919.

It can be written as a sum of positive squares in 3 ways, for example, as 16384 + 9174841 = 128^2 + 3029^2 .

It is not a de Polignac number, because 9191225 - 2¹⁰ = 9190201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9191227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 183800 + ... + 183849.

It is an arithmetic number, because the mean of its divisors is an integer number (1899525).

Almost surely, 2^9191225 is an apocalyptic number.

It is an amenable number.

9191225 is a deficient number, since it is larger than the sum of its proper divisors (2205925).

9191225 is a wasteful number, since it uses less digits than its factorization.

9191225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367659 (or 367654 counting only the distinct ones).

The product of its digits is 1620, while the sum is 29.

The square root of 9191225 is about 3031.7033166192. The cubic root of 9191225 is about 209.4712700524.

The spelling of 9191225 in words is "nine million, one hundred ninety-one thousand, two hundred twenty-five".