1243040343 has 8 divisors (see below), whose sum is σ = 1660016256. Its totient is φ = 827379000.

The previous prime is 1243040333. The next prime is 1243040389. The reversal of 1243040343 is 3430403421.

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

It is not a de Polignac number, because 1243040343 - 2¹² = 1243036247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243040303) 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, 326433 + ... + 330218.

It is an arithmetic number, because the mean of its divisors is an integer number (207502032).

Almost surely, 2^1243040343 is an apocalyptic number.

1243040343 is a deficient number, since it is larger than the sum of its proper divisors (416975913).

1243040343 is an equidigital number, since it uses as much as digits as its factorization.

1243040343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657285.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1243040343 is about 35256.7772633858. Note that the first 3 decimals coincide. The cubic root of 1243040343 is about 1075.2144062698.

Adding to 1243040343 its reverse (3430403421), we get a palindrome (4673443764).

The spelling of 1243040343 in words is "one billion, two hundred forty-three million, forty thousand, three hundred forty-three".