249845 has 8 divisors (see below), whose sum is σ = 303264. Its totient is φ = 197584.

The previous prime is 249833. The next prime is 249853. The reversal of 249845 is 548942.

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

It is a cyclic number.

It is not a de Polignac number, because 249845 - 2⁸ = 249589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302 + ... + 768.

It is an arithmetic number, because the mean of its divisors is an integer number (37908).

2²⁴⁹⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

249845 is a deficient number, since it is larger than the sum of its proper divisors (53419).

249845 is a wasteful number, since it uses less digits than its factorization.

249845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579.

The product of its digits is 11520, while the sum is 32.

The square root of 249845 is about 499.8449759675. The cubic root of 249845 is about 62.9830306190.

The spelling of 249845 in words is "two hundred forty-nine thousand, eight hundred forty-five".