1042721775171 has 24 divisors (see below), whose sum is σ = 1513673029440. Its totient is φ = 691679041200.

The previous prime is 1042721775167. The next prime is 1042721775197. The reversal of 1042721775171 is 1715771272401.

1042721775171 is a `hidden beast` number, since 1 + 0 + 42 + 7 + 21 + 77 + 517 + 1 = 666.

It is not a de Polignac number, because 1042721775171 - 2² = 1042721775167 is a prime.

It is a super-2 number, since 2×1042721775171² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1042721775971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7701700 + ... + 7835918.

It is an arithmetic number, because the mean of its divisors is an integer number (63069709560).

Almost surely, 2^{1042721775171} is an apocalyptic number.

1042721775171 is a deficient number, since it is larger than the sum of its proper divisors (470951254269).

1042721775171 is a wasteful number, since it uses less digits than its factorization.

1042721775171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138527 (or 138524 counting only the distinct ones).

The product of its (nonzero) digits is 192080, while the sum is 45.

The spelling of 1042721775171 in words is "one trillion, forty-two billion, seven hundred twenty-one million, seven hundred seventy-five thousand, one hundred seventy-one".