1243201343 has 4 divisors (see below), whose sum is σ = 1245588048. Its totient is φ = 1240814640.

The previous prime is 1243201327. The next prime is 1243201387. The reversal of 1243201343 is 3431023421.

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

It is a cyclic number.

It is not a de Polignac number, because 1243201343 - 2⁴ = 1243201327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243209343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1192571 + ... + 1193612.

It is an arithmetic number, because the mean of its divisors is an integer number (311397012).

Almost surely, 2^1243201343 is an apocalyptic number.

1243201343 is a deficient number, since it is larger than the sum of its proper divisors (2386705).

1243201343 is an equidigital number, since it uses as much as digits as its factorization.

1243201343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386704.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1243201343 is about 35259.0604384178. The cubic root of 1243201343 is about 1075.2608252637.

Adding to 1243201343 its reverse (3431023421), we get a palindrome (4674224764).

The spelling of 1243201343 in words is "one billion, two hundred forty-three million, two hundred one thousand, three hundred forty-three".