745128171 has 12 divisors (see below), whose sum is σ = 1123092048. Its totient is φ = 475154064.

The previous prime is 745128157. The next prime is 745128179. The reversal of 745128171 is 171821547.

745128171 is a `hidden beast` number, since 74 + 512 + 8 + 1 + 71 = 666.

745128171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 745128171 - 2⁹ = 745127659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (745128179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1799620 + ... + 1800033.

It is an arithmetic number, because the mean of its divisors is an integer number (93591004).

Almost surely, 2^745128171 is an apocalyptic number.

745128171 is a deficient number, since it is larger than the sum of its proper divisors (377963877).

745128171 is a wasteful number, since it uses less digits than its factorization.

745128171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3599682 (or 3599679 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

The square root of 745128171 is about 27297.0359379915. The cubic root of 745128171 is about 906.5887544936.

The spelling of 745128171 in words is "seven hundred forty-five million, one hundred twenty-eight thousand, one hundred seventy-one".