249752545 has 16 divisors (see below), whose sum is σ = 343145088. Its totient is φ = 170945280.

The previous prime is 249752543. The next prime is 249752563. The reversal of 249752545 is 545257942.

It is not a de Polignac number, because 249752545 - 2¹ = 249752543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249752543) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13737 + ... + 26233.

It is an arithmetic number, because the mean of its divisors is an integer number (21446568).

Almost surely, 2^249752545 is an apocalyptic number.

It is an amenable number.

249752545 is a deficient number, since it is larger than the sum of its proper divisors (93392543).

249752545 is a wasteful number, since it uses less digits than its factorization.

249752545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13080.

The product of its digits is 504000, while the sum is 43.

The square root of 249752545 is about 15803.5611493106. The cubic root of 249752545 is about 629.7526071563.

The spelling of 249752545 in words is "two hundred forty-nine million, seven hundred fifty-two thousand, five hundred forty-five".