1242864807786 has 96 divisors (see below), whose sum is σ = 3213174706560. Its totient is φ = 355068100800.

The previous prime is 1242864807733. The next prime is 1242864807799. The reversal of 1242864807786 is 6877084682421.

1242864807786 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 8 + 6 + 480 + 77 + 86 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36579846 + ... + 36613806.

It is an arithmetic number, because the mean of its divisors is an integer number (33470569860).

Almost surely, 2^{1242864807786} is an apocalyptic number.

1242864807786 is an abundant number, since it is smaller than the sum of its proper divisors (1970309898774).

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

1242864807786 is a wasteful number, since it uses less digits than its factorization.

1242864807786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47817 (or 47804 counting only the distinct ones).

The product of its (nonzero) digits is 57802752, while the sum is 63.

The spelling of 1242864807786 in words is "one trillion, two hundred forty-two billion, eight hundred sixty-four million, eight hundred seven thousand, seven hundred eighty-six".