249171 has 8 divisors (see below), whose sum is σ = 357840. Its totient is φ = 153312.

The previous prime is 249143. The next prime is 249181. The reversal of 249171 is 171942.

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

It is not a de Polignac number, because 249171 - 2⁶ = 249107 is a prime.

249171 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (249131) 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 7 ways as a sum of consecutive naturals, for example, 3156 + ... + 3233.

It is an arithmetic number, because the mean of its divisors is an integer number (44730).

2²⁴⁹¹⁷¹ is an apocalyptic number.

249171 is a deficient number, since it is larger than the sum of its proper divisors (108669).

249171 is a wasteful number, since it uses less digits than its factorization.

249171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6405.

The product of its digits is 504, while the sum is 24.

The square root of 249171 is about 499.1703116172. The cubic root of 249171 is about 62.9263437498.

The spelling of 249171 in words is "two hundred forty-nine thousand, one hundred seventy-one".