1242557127613 has 8 divisors (see below), whose sum is σ = 1250502755832. Its totient is φ = 1234611895296.

The previous prime is 1242557127611. The next prime is 1242557127619. The reversal of 1242557127613 is 3167217552421.

It can be written as a sum of positive squares in 4 ways, for example, as 347559769764 + 894997357849 = 589542^2 + 946043^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1242557127613 - 2¹ = 1242557127611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242557127611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8673381 + ... + 8815477.

It is an arithmetic number, because the mean of its divisors is an integer number (156312844479).

Almost surely, 2^{1242557127613} is an apocalyptic number.

It is an amenable number.

1242557127613 is a deficient number, since it is larger than the sum of its proper divisors (7945628219).

1242557127613 is a wasteful number, since it uses less digits than its factorization.

1242557127613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197951.

The product of its digits is 705600, while the sum is 46.

The spelling of 1242557127613 in words is "one trillion, two hundred forty-two billion, five hundred fifty-seven million, one hundred twenty-seven thousand, six hundred thirteen".