249123 has 8 divisors (see below), whose sum is σ = 379648. Its totient is φ = 142344.

The previous prime is 249107. The next prime is 249127. The reversal of 249123 is 321942.

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

It is not a de Polignac number, because 249123 - 2⁴ = 249107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 11863 = 249123 / (2 + 4 + 9 + 1 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249123.

It is not an unprimeable number, because it can be changed into a prime (249127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5911 + ... + 5952.

It is an arithmetic number, because the mean of its divisors is an integer number (47456).

2²⁴⁹¹²³ is an apocalyptic number.

249123 is a deficient number, since it is larger than the sum of its proper divisors (130525).

249123 is a wasteful number, since it uses less digits than its factorization.

249123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11873.

The product of its digits is 432, while the sum is 21.

The square root of 249123 is about 499.1222295190. The cubic root of 249123 is about 62.9223028054.

The spelling of 249123 in words is "two hundred forty-nine thousand, one hundred twenty-three".