249273745 has 8 divisors (see below), whose sum is σ = 341861184. Its totient is φ = 170930544.

The previous prime is 249273733. The next prime is 249273751. The reversal of 249273745 is 547372942.

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 249273745 - 2¹³ = 249265553 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 3561019 + ... + 3561088.

It is an arithmetic number, because the mean of its divisors is an integer number (42732648).

Almost surely, 2^249273745 is an apocalyptic number.

It is an amenable number.

249273745 is a deficient number, since it is larger than the sum of its proper divisors (92587439).

249273745 is an equidigital number, since it uses as much as digits as its factorization.

249273745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122119.

The product of its digits is 423360, while the sum is 43.

The square root of 249273745 is about 15788.4053976328. The cubic root of 249273745 is about 629.3499173147.

The spelling of 249273745 in words is "two hundred forty-nine million, two hundred seventy-three thousand, seven hundred forty-five".