1243244243 has 4 divisors (see below), whose sum is σ = 1283348928. Its totient is φ = 1203139560.

The previous prime is 1243244237. The next prime is 1243244263. The reversal of 1243244243 is 3424423421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3424423421 = 1303 ⋅2628107.

It is a cyclic number.

It is not a de Polignac number, because 1243244243 - 2⁴ = 1243244227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243244203) 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, 20052296 + ... + 20052357.

It is an arithmetic number, because the mean of its divisors is an integer number (320837232).

Almost surely, 2^1243244243 is an apocalyptic number.

1243244243 is a deficient number, since it is larger than the sum of its proper divisors (40104685).

1243244243 is an equidigital number, since it uses as much as digits as its factorization.

1243244243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40104684.

The product of its digits is 18432, while the sum is 29.

The square root of 1243244243 is about 35259.6687874404. The cubic root of 1243244243 is about 1075.2731933753.

Adding to 1243244243 its reverse (3424423421), we get a palindrome (4667667664).

The spelling of 1243244243 in words is "one billion, two hundred forty-three million, two hundred forty-four thousand, two hundred forty-three".