12209361 has 4 divisors (see below), whose sum is σ = 16279152. Its totient is φ = 8139572.

The previous prime is 12209359. The next prime is 12209369. The reversal of 12209361 is 16390221.

12209361 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12209361 - 2¹ = 12209359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12209369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2034891 + ... + 2034896.

It is an arithmetic number, because the mean of its divisors is an integer number (4069788).

Almost surely, 2^12209361 is an apocalyptic number.

It is an amenable number.

12209361 is a deficient number, since it is larger than the sum of its proper divisors (4069791).

12209361 is an equidigital number, since it uses as much as digits as its factorization.

12209361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069790.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 12209361 is about 3494.1896056167. The cubic root of 12209361 is about 230.2666158354.

Adding to 12209361 its reverse (16390221), we get a palindrome (28599582).

The spelling of 12209361 in words is "twelve million, two hundred nine thousand, three hundred sixty-one".