171128405 has 8 divisors (see below), whose sum is σ = 234690432. Its totient is φ = 117345168.

The previous prime is 171128387. The next prime is 171128429. The reversal of 171128405 is 504821171.

171128405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 171128405 - 2¹⁰ = 171127381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2444657 + ... + 2444726.

It is an arithmetic number, because the mean of its divisors is an integer number (29336304).

Almost surely, 2^171128405 is an apocalyptic number.

It is an amenable number.

171128405 is a deficient number, since it is larger than the sum of its proper divisors (63562027).

171128405 is an equidigital number, since it uses as much as digits as its factorization.

171128405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4889395.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 171128405 is about 13081.6055971735. The cubic root of 171128405 is about 555.1888057138.

Adding to 171128405 its reverse (504821171), we get a palindrome (675949576).

The spelling of 171128405 in words is "one hundred seventy-one million, one hundred twenty-eight thousand, four hundred five".