1243023043403 has 4 divisors (see below), whose sum is σ = 1243034475120. Its totient is φ = 1243011611688.

The previous prime is 1243023043373. The next prime is 1243023043421. The reversal of 1243023043403 is 3043403203421.

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-1243023043403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243023043433) 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, 5551175 + ... + 5770752.

It is an arithmetic number, because the mean of its divisors is an integer number (310758618780).

Almost surely, 2^{1243023043403} is an apocalyptic number.

1243023043403 is a deficient number, since it is larger than the sum of its proper divisors (11431717).

1243023043403 is a wasteful number, since it uses less digits than its factorization.

1243023043403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11431716.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 1243023043403 its reverse (3043403203421), we get a palindrome (4286426246824).

The spelling of 1243023043403 in words is "one trillion, two hundred forty-three billion, twenty-three million, forty-three thousand, four hundred three".