1243241305 has 8 divisors (see below), whose sum is σ = 1516347144. Its totient is φ = 978288000.

The previous prime is 1243241273. The next prime is 1243241309. The reversal of 1243241305 is 5031423421.

1243241305 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5890329 + 1237350976 = 2427^2 + 35176^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1243241305 - 2⁵ = 1243241273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1243241305.

It is not an unprimeable number, because it can be changed into a prime (1243241309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2037796 + ... + 2038405.

It is an arithmetic number, because the mean of its divisors is an integer number (189543393).

Almost surely, 2^1243241305 is an apocalyptic number.

It is an amenable number.

1243241305 is a deficient number, since it is larger than the sum of its proper divisors (273105839).

1243241305 is an equidigital number, since it uses as much as digits as its factorization.

1243241305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4076267.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1243241305 is about 35259.6271250846. The cubic root of 1243241305 is about 1075.2723463561.

Adding to 1243241305 its reverse (5031423421), we get a palindrome (6274664726).

The spelling of 1243241305 in words is "one billion, two hundred forty-three million, two hundred forty-one thousand, three hundred five".