1243230434 has 16 divisors (see below), whose sum is σ = 2011800888. Its totient is φ = 574010112.

The previous prime is 1243230427. The next prime is 1243230437. The reversal of 1243230434 is 4340323421.

It can be written as a sum of positive squares in 4 ways, for example, as 1228292209 + 14938225 = 35047^2 + 3865^2 .

It is not an unprimeable number, because it can be changed into a prime (1243230437) 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, 343157 + ... + 346760.

Almost surely, 2^1243230434 is an apocalyptic number.

1243230434 is a deficient number, since it is larger than the sum of its proper divisors (768570454).

1243230434 is a wasteful number, since it uses less digits than its factorization.

1243230434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689989.

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 1243230434 is about 35259.4729682677. The cubic root of 1243230434 is about 1075.2692122583.

Adding to 1243230434 its reverse (4340323421), we get a palindrome (5583553855).

The spelling of 1243230434 in words is "one billion, two hundred forty-three million, two hundred thirty thousand, four hundred thirty-four".