1243004231 has 4 divisors (see below), whose sum is σ = 1420576272. Its totient is φ = 1065432192.

The previous prime is 1243004209. The next prime is 1243004237. The reversal of 1243004231 is 1324003421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1243004231 - 2¹⁰ = 1243003207 is a prime.

It is a super-2 number, since 2×1243004231² = 3090119036567802722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243004237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88786010 + ... + 88786023.

It is an arithmetic number, because the mean of its divisors is an integer number (355144068).

Almost surely, 2^1243004231 is an apocalyptic number.

1243004231 is a deficient number, since it is larger than the sum of its proper divisors (177572041).

1243004231 is an equidigital number, since it uses as much as digits as its factorization.

1243004231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177572040.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1243004231 is about 35256.2651311792. The cubic root of 1243004231 is about 1075.2039940257.

Adding to 1243004231 its reverse (1324003421), we get a palindrome (2567007652).

The spelling of 1243004231 in words is "one billion, two hundred forty-three million, four thousand, two hundred thirty-one".