1042721775756 has 48 divisors (see below), whose sum is σ = 2703422074080. Its totient is φ = 347565012480.

The previous prime is 1042721775749. The next prime is 1042721775791. The reversal of 1042721775756 is 6575771272401.

1042721775756 is a `hidden beast` number, since 1 + 0 + 42 + 7 + 21 + 7 + 7 + 575 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 15 ways as a sum of consecutive naturals, for example, 5138136 + ... + 5337216.

It is an arithmetic number, because the mean of its divisors is an integer number (56321293210).

Almost surely, 2^{1042721775756} is an apocalyptic number.

It is an amenable number.

1042721775756 is an abundant number, since it is smaller than the sum of its proper divisors (1660700298324).

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

1042721775756 is a wasteful number, since it uses less digits than its factorization.

1042721775756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247591 (or 247583 counting only the distinct ones).

The product of its (nonzero) digits is 5762400, while the sum is 54.

The spelling of 1042721775756 in words is "one trillion, forty-two billion, seven hundred twenty-one million, seven hundred seventy-five thousand, seven hundred fifty-six".