12209453 has 4 divisors (see below), whose sum is σ = 12216540. Its totient is φ = 12202368.

The previous prime is 12209447. The next prime is 12209459. The reversal of 12209453 is 35490221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 35490221 = 13 ⋅2730017.

It is an interprime number because it is at equal distance from previous prime (12209447) and next prime (12209459).

It can be written as a sum of positive squares in 2 ways, for example, as 4380649 + 7828804 = 2093^2 + 2798^2 .

It is a cyclic number.

It is not a de Polignac number, because 12209453 - 2⁴ = 12209437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12209459) 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 3 ways as a sum of consecutive naturals, for example, 893 + ... + 5021.

It is an arithmetic number, because the mean of its divisors is an integer number (3054135).

Almost surely, 2^12209453 is an apocalyptic number.

It is an amenable number.

12209453 is a deficient number, since it is larger than the sum of its proper divisors (7087).

12209453 is an equidigital number, since it uses as much as digits as its factorization.

12209453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7086.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 12209453 is about 3494.2027703040. The cubic root of 12209453 is about 230.2671942025.

Adding to 12209453 its reverse (35490221), we get a palindrome (47699674).

The spelling of 12209453 in words is "twelve million, two hundred nine thousand, four hundred fifty-three".