249897265 has 8 divisors (see below), whose sum is σ = 302238720. Its totient is φ = 198343152.

The previous prime is 249897257. The next prime is 249897281. The reversal of 249897265 is 562798942.

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 249897265 - 2³ = 249897257 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196135 + ... + 197404.

It is an arithmetic number, because the mean of its divisors is an integer number (37779840).

Almost surely, 2^249897265 is an apocalyptic number.

It is an amenable number.

249897265 is a deficient number, since it is larger than the sum of its proper divisors (52341455).

249897265 is a wasteful number, since it uses less digits than its factorization.

249897265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393671.

The product of its digits is 2177280, while the sum is 52.

The square root of 249897265 is about 15808.1392010572. The cubic root of 249897265 is about 629.8742211318.

The spelling of 249897265 in words is "two hundred forty-nine million, eight hundred ninety-seven thousand, two hundred sixty-five".