1242401543403 has 8 divisors (see below), whose sum is σ = 1661049113088. Its totient is φ = 826010834664.

The previous prime is 1242401543389. The next prime is 1242401543417. The reversal of 1242401543403 is 3043451042421.

It is an interprime number because it is at equal distance from previous prime (1242401543389) and next prime (1242401543417).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1242401543403 - 2⁸ = 1242401543147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242401543003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564213951 + ... + 564216152.

It is an arithmetic number, because the mean of its divisors is an integer number (207631139136).

Almost surely, 2^{1242401543403} is an apocalyptic number.

1242401543403 is a deficient number, since it is larger than the sum of its proper divisors (418647569685).

1242401543403 is a wasteful number, since it uses less digits than its factorization.

1242401543403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128430473.

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 1242401543403 its reverse (3043451042421), we get a palindrome (4285852585824).

The spelling of 1242401543403 in words is "one trillion, two hundred forty-two billion, four hundred one million, five hundred forty-three thousand, four hundred three".