249045 has 8 divisors (see below), whose sum is σ = 398496. Its totient is φ = 132816.

The previous prime is 249037. The next prime is 249059. The reversal of 249045 is 540942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 249045 - 2³ = 249037 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 8287 + ... + 8316.

It is an arithmetic number, because the mean of its divisors is an integer number (49812).

2²⁴⁹⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

249045 is a deficient number, since it is larger than the sum of its proper divisors (149451).

249045 is a wasteful number, since it uses less digits than its factorization.

249045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16611.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 249045 is about 499.0440862289. The cubic root of 249045 is about 62.9157351635.

Adding to 249045 its reverse (540942), we get a palindrome (789987).

The spelling of 249045 in words is "two hundred forty-nine thousand, forty-five".