1242031605255 has 128 divisors (see below), whose sum is σ = 2574449049600. Its totient is φ = 556433805312.

The previous prime is 1242031605107. The next prime is 1242031605307. The reversal of 1242031605255 is 5525061302421.

1242031605255 is a `hidden beast` number, since 1 + 2 + 4 + 20 + 3 + 1 + 605 + 25 + 5 = 666.

It is not a de Polignac number, because 1242031605255 - 2¹⁵ = 1242031572487 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9438522 + ... + 9569208.

It is an arithmetic number, because the mean of its divisors is an integer number (20112883200).

Almost surely, 2^{1242031605255} is an apocalyptic number.

1242031605255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1242031605255 is an abundant number, since it is smaller than the sum of its proper divisors (1332417444345).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242031605255 is a wasteful number, since it uses less digits than its factorization.

1242031605255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130910 (or 130904 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 1242031605255 its reverse (5525061302421), we get a palindrome (6767092907676).

The spelling of 1242031605255 in words is "one trillion, two hundred forty-two billion, thirty-one million, six hundred five thousand, two hundred fifty-five".