1042721775697 has 32 divisors (see below), whose sum is σ = 1268004291840. Its totient is φ = 837047900160.

The previous prime is 1042721775653. The next prime is 1042721775709. The reversal of 1042721775697 is 7965771272401.

It is a cyclic number.

It is not a de Polignac number, because 1042721775697 - 2¹⁵ = 1042721742929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042721775197) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 21515629 + ... + 21564037.

It is an arithmetic number, because the mean of its divisors is an integer number (39625134120).

Almost surely, 2^{1042721775697} is an apocalyptic number.

1042721775697 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1042721775697 is a deficient number, since it is larger than the sum of its proper divisors (225282516143).

1042721775697 is a wasteful number, since it uses less digits than its factorization.

1042721775697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49321.

The product of its (nonzero) digits is 10372320, while the sum is 58.

The spelling of 1042721775697 in words is "one trillion, forty-two billion, seven hundred twenty-one million, seven hundred seventy-five thousand, six hundred ninety-seven".