1243434231 has 36 divisors (see below), whose sum is σ = 1963988208. Its totient is φ = 757665792.

The previous prime is 1243434229. The next prime is 1243434239. The reversal of 1243434231 is 1324343421.

It is not a de Polignac number, because 1243434231 - 2¹ = 1243434229 is a prime.

It is a super-2 number, since 2×1243434231² = 3092257373645122722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1243434195 and 1243434204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243434239) 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 35 ways as a sum of consecutive naturals, for example, 152695 + ... + 160631.

It is an arithmetic number, because the mean of its divisors is an integer number (54555228).

Almost surely, 2^1243434231 is an apocalyptic number.

1243434231 is a deficient number, since it is larger than the sum of its proper divisors (720553977).

1243434231 is a wasteful number, since it uses less digits than its factorization.

1243434231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8072 (or 8056 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 1243434231 is about 35262.3628107930. The cubic root of 1243434231 is about 1075.3279636800.

Adding to 1243434231 its reverse (1324343421), we get a palindrome (2567777652).

It can be divided in two parts, 12434 and 34231, that added together give a triangular number (46665 = T₃₀₅).

The spelling of 1243434231 in words is "one billion, two hundred forty-three million, four hundred thirty-four thousand, two hundred thirty-one".