171129145 has 32 divisors (see below), whose sum is σ = 239293440. Its totient is φ = 116256000.

The previous prime is 171129139. The next prime is 171129149. The reversal of 171129145 is 541921171.

171129145 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 171129145 - 2³ = 171129137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (171129149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47715 + ... + 51175.

It is an arithmetic number, because the mean of its divisors is an integer number (7477920).

Almost surely, 2^171129145 is an apocalyptic number.

It is an amenable number.

171129145 is a deficient number, since it is larger than the sum of its proper divisors (68164295).

171129145 is a wasteful number, since it uses less digits than its factorization.

171129145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537.

The product of its digits is 2520, while the sum is 31.

The square root of 171129145 is about 13081.6338811327. The cubic root of 171129145 is about 555.1896059689.

The spelling of 171129145 in words is "one hundred seventy-one million, one hundred twenty-nine thousand, one hundred forty-five".