1243253343 has 8 divisors (see below), whose sum is σ = 1666830256. Its totient is φ = 824256000.

The previous prime is 1243253329. The next prime is 1243253359. The reversal of 1243253343 is 3433523421.

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

It is not a de Polignac number, because 1243253343 - 2²⁸ = 974817887 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 1243253343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243251343) 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, 1144258 + ... + 1145343.

It is an arithmetic number, because the mean of its divisors is an integer number (208353782).

Almost surely, 2^1243253343 is an apocalyptic number.

1243253343 is a deficient number, since it is larger than the sum of its proper divisors (423576913).

1243253343 is a wasteful number, since it uses less digits than its factorization.

1243253343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289785.

The product of its digits is 25920, while the sum is 30.

The square root of 1243253343 is about 35259.7978298231. The cubic root of 1243253343 is about 1075.2758168775.

Adding to 1243253343 its reverse (3433523421), we get a palindrome (4676776764).

The spelling of 1243253343 in words is "one billion, two hundred forty-three million, two hundred fifty-three thousand, three hundred forty-three".