1242058778250 has 64 divisors (see below), whose sum is σ = 3103006817664. Its totient is φ = 330913526400.

The previous prime is 1242058778249. The next prime is 1242058778269. The reversal of 1242058778250 is 528778502421.

It is a junction number, because it is equal to n+sod(n) for n = 1242058778193 and 1242058778202.

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 31 ways as a sum of consecutive naturals, for example, 67929 + ... + 1577571.

It is an arithmetic number, because the mean of its divisors is an integer number (48484481526).

Almost surely, 2^{1242058778250} is an apocalyptic number.

1242058778250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242058778250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1551503408832).

1242058778250 is an abundant number, since it is smaller than the sum of its proper divisors (1860948039414).

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

1242058778250 is a wasteful number, since it uses less digits than its factorization.

1242058778250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510760 (or 1510750 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 51.

The spelling of 1242058778250 in words is "one trillion, two hundred forty-two billion, fifty-eight million, seven hundred seventy-eight thousand, two hundred fifty".