12441809 has 4 divisors (see below), whose sum is σ = 12539904. Its totient is φ = 12343716.

The previous prime is 12441791. The next prime is 12441823. The reversal of 12441809 is 90814421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90814421 = 61 ⋅1488761.

It is a cyclic number.

It is not a de Polignac number, because 12441809 - 2⁸ = 12441553 is a prime.

It is a super-2 number, since 2×12441809² = 309597222384962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12441859) 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, 48857 + ... + 49110.

It is an arithmetic number, because the mean of its divisors is an integer number (3134976).

Almost surely, 2^12441809 is an apocalyptic number.

It is an amenable number.

12441809 is a deficient number, since it is larger than the sum of its proper divisors (98095).

12441809 is an equidigital number, since it uses as much as digits as its factorization.

12441809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98094.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 12441809 is about 3527.2948558350. The cubic root of 12441809 is about 231.7187497986.

The spelling of 12441809 in words is "twelve million, four hundred forty-one thousand, eight hundred nine".