249997245 has 32 divisors (see below), whose sum is σ = 408627072. Its totient is φ = 130486272.

The previous prime is 249997217. The next prime is 249997247. The reversal of 249997245 is 542799942.

It is not a de Polignac number, because 249997245 - 2¹¹ = 249995197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249997247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139797 + ... + 141573.

It is an arithmetic number, because the mean of its divisors is an integer number (12769596).

Almost surely, 2^249997245 is an apocalyptic number.

It is an amenable number.

249997245 is a deficient number, since it is larger than the sum of its proper divisors (158629827).

249997245 is a wasteful number, since it uses less digits than its factorization.

249997245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981.

The product of its digits is 1632960, while the sum is 51.

The square root of 249997245 is about 15811.3011798523. The cubic root of 249997245 is about 629.9582108839.

The spelling of 249997245 in words is "two hundred forty-nine million, nine hundred ninety-seven thousand, two hundred forty-five".