171428 has 12 divisors (see below), whose sum is σ = 317772. Its totient is φ = 80640.

The previous prime is 171427. The next prime is 171439. The reversal of 171428 is 824171.

171428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47524 + 123904 = 218^2 + 352^2 .

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 171428.

It is not an unprimeable number, because it can be changed into a prime (171427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193 + ... + 1328.

It is an arithmetic number, because the mean of its divisors is an integer number (26481).

2¹⁷¹⁴²⁸ is an apocalyptic number.

It is an amenable number.

171428 is a deficient number, since it is larger than the sum of its proper divisors (146344).

171428 is a wasteful number, since it uses less digits than its factorization.

171428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2542 (or 2540 counting only the distinct ones).

The product of its digits is 448, while the sum is 23.

The square root of 171428 is about 414.0386455393. The cubic root of 171428 is about 55.5512607050.

Subtracting from 171428 its sum of digits (23), we obtain a triangular number (171405 = T₅₈₅).

Adding to 171428 its reverse (824171), we get a palindrome (995599).

The spelling of 171428 in words is "one hundred seventy-one thousand, four hundred twenty-eight".