249239 has 4 divisors (see below), whose sum is σ = 255360. Its totient is φ = 243120.

The previous prime is 249233. The next prime is 249253. The reversal of 249239 is 932942.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249239 is a prime.

It is a d-powerful number, because it can be written as 2 + 4³ + 2¹⁷ + 9⁵ + 3 + 9⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249233) 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, 2999 + ... + 3080.

It is an arithmetic number, because the mean of its divisors is an integer number (63840).

2²⁴⁹²³⁹ is an apocalyptic number.

249239 is a deficient number, since it is larger than the sum of its proper divisors (6121).

249239 is an equidigital number, since it uses as much as digits as its factorization.

249239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120.

The product of its digits is 3888, while the sum is 29.

The square root of 249239 is about 499.2384199959. The cubic root of 249239 is about 62.9320675328.

The spelling of 249239 in words is "two hundred forty-nine thousand, two hundred thirty-nine".