1243236434 has 16 divisors (see below), whose sum is σ = 2122839360. Its totient is φ = 540537360.

The previous prime is 1243236403. The next prime is 1243236437. The reversal of 1243236434 is 4346323421.

It is a self number, because there is not a number n which added to its sum of digits gives 1243236434.

It is not an unprimeable number, because it can be changed into a prime (1243236437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1227989 + ... + 1229000.

It is an arithmetic number, because the mean of its divisors is an integer number (132677460).

Almost surely, 2^1243236434 is an apocalyptic number.

1243236434 is a deficient number, since it is larger than the sum of its proper divisors (879602926).

1243236434 is a wasteful number, since it uses less digits than its factorization.

1243236434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457025.

The product of its digits is 41472, while the sum is 32.

The square root of 1243236434 is about 35259.5580516830. The cubic root of 1243236434 is about 1075.2709420542.

Adding to 1243236434 its reverse (4346323421), we get a palindrome (5589559855).

The spelling of 1243236434 in words is "one billion, two hundred forty-three million, two hundred thirty-six thousand, four hundred thirty-four".