1243203423 has 32 divisors (see below), whose sum is σ = 2074191360. Its totient is φ = 643455360.

The previous prime is 1243203371. The next prime is 1243203443. The reversal of 1243203423 is 3243023421.

It is not a de Polignac number, because 1243203423 - 2¹⁴ = 1243187039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243203393 and 1243203402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243203443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54273 + ... + 73701.

It is an arithmetic number, because the mean of its divisors is an integer number (64818480).

Almost surely, 2^1243203423 is an apocalyptic number.

1243203423 is a deficient number, since it is larger than the sum of its proper divisors (830987937).

1243203423 is a wasteful number, since it uses less digits than its factorization.

1243203423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19727.

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

The square root of 1243203423 is about 35259.0899343701. The cubic root of 1243203423 is about 1075.2614249363.

Adding to 1243203423 its reverse (3243023421), we get a palindrome (4486226844).

The spelling of 1243203423 in words is "one billion, two hundred forty-three million, two hundred three thousand, four hundred twenty-three".