249189242 has 8 divisors (see below), whose sum is σ = 373864896. Its totient is φ = 124567612.

The previous prime is 249189229. The next prime is 249189251. The reversal of 249189242 is 242981942.

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

It is a self number, because there is not a number n which added to its sum of digits gives 249189242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253 + ... + 22359.

It is an arithmetic number, because the mean of its divisors is an integer number (46733112).

Almost surely, 2^249189242 is an apocalyptic number.

249189242 is a deficient number, since it is larger than the sum of its proper divisors (124675654).

249189242 is a wasteful number, since it uses less digits than its factorization.

249189242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27012.

The product of its digits is 82944, while the sum is 41.

The square root of 249189242 is about 15785.7290614023. The cubic root of 249189242 is about 629.2787934094.

The spelling of 249189242 in words is "two hundred forty-nine million, one hundred eighty-nine thousand, two hundred forty-two".