1242003555525 has 48 divisors (see below), whose sum is σ = 2097002067008. Its totient is φ = 648454464000.

The previous prime is 1242003555517. The next prime is 1242003555619. The reversal of 1242003555525 is 5255553002421.

It is not a de Polignac number, because 1242003555525 - 2³ = 1242003555517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 322017 + ... + 1608633.

Almost surely, 2^{1242003555525} is an apocalyptic number.

1242003555525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242003555525 is a deficient number, since it is larger than the sum of its proper divisors (854998511483).

1242003555525 is a wasteful number, since it uses less digits than its factorization.

1242003555525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286902 (or 1286897 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 39.

Adding to 1242003555525 its reverse (5255553002421), we get a palindrome (6497556557946).

The spelling of 1242003555525 in words is "one trillion, two hundred forty-two billion, three million, five hundred fifty-five thousand, five hundred twenty-five".