1234345543243 has 4 divisors (see below), whose sum is σ = 1234443155760. Its totient is φ = 1234247930728.

The previous prime is 1234345543229. The next prime is 1234345543247. The reversal of 1234345543243 is 3423455434321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1234345543243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1234345543243.

It is not an unprimeable number, because it can be changed into a prime (1234345543247) 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, 48787288 + ... + 48812581.

It is an arithmetic number, because the mean of its divisors is an integer number (308610788940).

Almost surely, 2^{1234345543243} is an apocalyptic number.

1234345543243 is a deficient number, since it is larger than the sum of its proper divisors (97612517).

1234345543243 is an equidigital number, since it uses as much as digits as its factorization.

1234345543243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97612516.

The product of its digits is 2073600, while the sum is 43.

The spelling of 1234345543243 in words is "one trillion, two hundred thirty-four billion, three hundred forty-five million, five hundred forty-three thousand, two hundred forty-three".