1242031505403 has 16 divisors (see below), whose sum is σ = 1807860404000. Its totient is φ = 753856844544.

The previous prime is 1242031505381. The next prime is 1242031505419. The reversal of 1242031505403 is 3045051302421.

It is not a de Polignac number, because 1242031505403 - 2⁹ = 1242031504891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242031505203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218127028 + ... + 218132721.

It is an arithmetic number, because the mean of its divisors is an integer number (112991275250).

Almost surely, 2^{1242031505403} is an apocalyptic number.

1242031505403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1242031505403 is a deficient number, since it is larger than the sum of its proper divisors (565828898597).

1242031505403 is a wasteful number, since it uses less digits than its factorization.

1242031505403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436259838.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 1242031505403 its reverse (3045051302421), we get a palindrome (4287082807824).

The spelling of 1242031505403 in words is "one trillion, two hundred forty-two billion, thirty-one million, five hundred five thousand, four hundred three".