249299545 has 16 divisors (see below), whose sum is σ = 332517312. Its totient is φ = 177885760.

The previous prime is 249299539. The next prime is 249299549. The reversal of 249299545 is 545992942.

It is not a de Polignac number, because 249299545 - 2³ = 249299537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249299549) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 39847 + ... + 45676.

It is an arithmetic number, because the mean of its divisors is an integer number (20782332).

Almost surely, 2^249299545 is an apocalyptic number.

It is an amenable number.

249299545 is a deficient number, since it is larger than the sum of its proper divisors (83217767).

249299545 is a wasteful number, since it uses less digits than its factorization.

249299545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85592.

The product of its digits is 1166400, while the sum is 49.

The square root of 249299545 is about 15789.2224317729. Note that the first 3 decimals coincide. The cubic root of 249299545 is about 629.3716292786.

The spelling of 249299545 in words is "two hundred forty-nine million, two hundred ninety-nine thousand, five hundred forty-five".