249191 has 4 divisors (see below), whose sum is σ = 250584. Its totient is φ = 247800.

The previous prime is 249187. The next prime is 249199. The reversal of 249191 is 191942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191942 = 2 ⋅95971.

It is a cyclic number.

It is not a de Polignac number, because 249191 - 2² = 249187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249191.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249191.

It is not an unprimeable number, because it can be changed into a prime (249199) 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, 380 + ... + 801.

It is an arithmetic number, because the mean of its divisors is an integer number (62646).

2²⁴⁹¹⁹¹ is an apocalyptic number.

249191 is a deficient number, since it is larger than the sum of its proper divisors (1393).

249191 is a wasteful number, since it uses less digits than its factorization.

249191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392.

The product of its digits is 648, while the sum is 26.

The square root of 249191 is about 499.1903444579. The cubic root of 249191 is about 62.9280273234.

The spelling of 249191 in words is "two hundred forty-nine thousand, one hundred ninety-one".