1243420010003 has 4 divisors (see below), whose sum is σ = 1243433028768. Its totient is φ = 1243406991240.

The previous prime is 1243420009973. The next prime is 1243420010009. The reversal of 1243420010003 is 3000100243421.

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 1243420010003 - 2³² = 1239125042707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243420010009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6365051 + ... + 6557492.

It is an arithmetic number, because the mean of its divisors is an integer number (310858257192).

Almost surely, 2^{1243420010003} is an apocalyptic number.

1243420010003 is a deficient number, since it is larger than the sum of its proper divisors (13018765).

1243420010003 is an equidigital number, since it uses as much as digits as its factorization.

1243420010003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13018764.

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

Adding to 1243420010003 its reverse (3000100243421), we get a palindrome (4243520253424).

The spelling of 1243420010003 in words is "one trillion, two hundred forty-three billion, four hundred twenty million, ten thousand, three".