12209575 has 18 divisors (see below), whose sum is σ = 17613456. Its totient is φ = 8371440.

The previous prime is 12209563. The next prime is 12209579. The reversal of 12209575 is 57590221.

It is not a de Polignac number, because 12209575 - 2⁷ = 12209447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12209579) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3759 + ... + 6208.

Almost surely, 2^12209575 is an apocalyptic number.

12209575 is a deficient number, since it is larger than the sum of its proper divisors (5403881).

12209575 is an equidigital number, since it uses as much as digits as its factorization.

12209575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9991 (or 9979 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 12209575 is about 3494.2202277475. The cubic root of 12209575 is about 230.2679611630.

Adding to 12209575 its reverse (57590221), we get a palindrome (69799796).

The spelling of 12209575 in words is "twelve million, two hundred nine thousand, five hundred seventy-five".