249166 has 16 divisors (see below), whose sum is σ = 403200. Its totient is φ = 115128.

The previous prime is 249143. The next prime is 249181. The reversal of 249166 is 661942.

It is a congruent number.

It is an unprimeable number.

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, 2961 + ... + 3043.

It is an arithmetic number, because the mean of its divisors is an integer number (25200).

2²⁴⁹¹⁶⁶ is an apocalyptic number.

249166 is the 316-th heptagonal number.

249166 is a deficient number, since it is larger than the sum of its proper divisors (154034).

249166 is a wasteful number, since it uses less digits than its factorization.

249166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183.

The product of its digits is 2592, while the sum is 28.

The square root of 249166 is about 499.1653032814. The cubic root of 249166 is about 62.9259228423.

The spelling of 249166 in words is "two hundred forty-nine thousand, one hundred sixty-six".