171497 has 4 divisors (see below), whose sum is σ = 172356. Its totient is φ = 170640.

The previous prime is 171491. The next prime is 171517. The reversal of 171497 is 794171.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 794171 = 7 ⋅113453.

It can be written as a sum of positive squares in 2 ways, for example, as 33856 + 137641 = 184^2 + 371^2 .

It is a cyclic number.

It is not a de Polignac number, because 171497 - 2⁴ = 171481 is a prime.

It is a super-2 number, since 2×171497² = 58822442018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47 + ... + 587.

It is an arithmetic number, because the mean of its divisors is an integer number (43089).

2¹⁷¹⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

171497 is a deficient number, since it is larger than the sum of its proper divisors (859).

171497 is an equidigital number, since it uses as much as digits as its factorization.

171497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858.

The product of its digits is 1764, while the sum is 29.

The square root of 171497 is about 414.1219627115. The cubic root of 171497 is about 55.5587128576.

The spelling of 171497 in words is "one hundred seventy-one thousand, four hundred ninety-seven".