1242878617326 has 32 divisors (see below), whose sum is σ = 2509005156768. Its totient is φ = 410436034560.

The previous prime is 1242878617289. The next prime is 1242878617327. The reversal of 1242878617326 is 6237168782421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242878617327) 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, 1947681 + ... + 2505836.

It is an arithmetic number, because the mean of its divisors is an integer number (78406411149).

Almost surely, 2^{1242878617326} is an apocalyptic number.

1242878617326 is an abundant number, since it is smaller than the sum of its proper divisors (1266126539442).

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

1242878617326 is a wasteful number, since it uses less digits than its factorization.

1242878617326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4453956.

The product of its digits is 10838016, while the sum is 57.

The spelling of 1242878617326 in words is "one trillion, two hundred forty-two billion, eight hundred seventy-eight million, six hundred seventeen thousand, three hundred twenty-six".