249115 has 4 divisors (see below), whose sum is σ = 298944. Its totient is φ = 199288.

The previous prime is 249107. The next prime is 249127. The reversal of 249115 is 511942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 511942 = 2 ⋅255971.

It is a cyclic number.

It is not a de Polignac number, because 249115 - 2³ = 249107 is a prime.

It is a Duffinian number.

249115 is a lucky number.

It is a plaindrome in base 14.

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 3 ways as a sum of consecutive naturals, for example, 24907 + ... + 24916.

It is an arithmetic number, because the mean of its divisors is an integer number (74736).

2²⁴⁹¹¹⁵ is an apocalyptic number.

249115 is a deficient number, since it is larger than the sum of its proper divisors (49829).

249115 is an equidigital number, since it uses as much as digits as its factorization.

249115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49828.

The product of its digits is 360, while the sum is 22.

The square root of 249115 is about 499.1142153856. The cubic root of 249115 is about 62.9216292642.

The spelling of 249115 in words is "two hundred forty-nine thousand, one hundred fifteen".