12399241 has 4 divisors (see below), whose sum is σ = 12436372. Its totient is φ = 12362112.

The previous prime is 12399199. The next prime is 12399251. The reversal of 12399241 is 14299321.

12399241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1901641 + 10497600 = 1379^2 + 3240^2 .

It is a cyclic number.

It is not a de Polignac number, because 12399241 - 2⁷ = 12399113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12399251) 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, 18060 + ... + 18733.

It is an arithmetic number, because the mean of its divisors is an integer number (3109093).

Almost surely, 2^12399241 is an apocalyptic number.

It is an amenable number.

12399241 is a deficient number, since it is larger than the sum of its proper divisors (37131).

12399241 is an equidigital number, since it uses as much as digits as its factorization.

12399241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37130.

The product of its digits is 3888, while the sum is 31.

The square root of 12399241 is about 3521.2555999245. The cubic root of 12399241 is about 231.4541828479.

The spelling of 12399241 in words is "twelve million, three hundred ninety-nine thousand, two hundred forty-one".