1312234243 has 4 divisors (see below), whose sum is σ = 1320924688. Its totient is φ = 1303543800.

The previous prime is 1312234229. The next prime is 1312234279. The reversal of 1312234243 is 3424322131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3424322131 = 499 ⋅6862369.

It is a cyclic number.

It is not a de Polignac number, because 1312234243 - 2⁵ = 1312234211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312234223) 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, 4344996 + ... + 4345297.

It is an arithmetic number, because the mean of its divisors is an integer number (330231172).

Almost surely, 2^1312234243 is an apocalyptic number.

1312234243 is a deficient number, since it is larger than the sum of its proper divisors (8690445).

1312234243 is an equidigital number, since it uses as much as digits as its factorization.

1312234243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8690444.

The product of its digits is 3456, while the sum is 25.

The square root of 1312234243 is about 36224.7738847325. The cubic root of 1312234243 is about 1094.8058823414.

Adding to 1312234243 its reverse (3424322131), we get a palindrome (4736556374).

The spelling of 1312234243 in words is "one billion, three hundred twelve million, two hundred thirty-four thousand, two hundred forty-three".