249131 has 2 divisors, whose sum is σ = 249132. Its totient is φ = 249130.

The previous prime is 249127. The next prime is 249133. The reversal of 249131 is 131942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249131 - 2² = 249127 is a prime.

It is a super-2 number, since 2×249131² = 124132510322, which contains 22 as substring.

Together with 249133, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249131.

It is not a weakly prime, because it can be changed into another prime (249133) 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 as a sum of consecutive naturals, namely, 124565 + 124566.

It is an arithmetic number, because the mean of its divisors is an integer number (124566).

2²⁴⁹¹³¹ is an apocalyptic number.

249131 is a deficient number, since it is larger than the sum of its proper divisors (1).

249131 is an equidigital number, since it uses as much as digits as its factorization.

249131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 249131 is about 499.1302435237. The cubic root of 249131 is about 62.9229763322.

The spelling of 249131 in words is "two hundred forty-nine thousand, one hundred thirty-one".