249999885 has 16 divisors (see below), whose sum is σ = 444444480. Its totient is φ = 133333200.

The previous prime is 249999877. The next prime is 249999889. The reversal of 249999885 is 588999942.

It is not a de Polignac number, because 249999885 - 2³ = 249999877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249999889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 925791 + ... + 926060.

It is an arithmetic number, because the mean of its divisors is an integer number (27777780).

Almost surely, 2^249999885 is an apocalyptic number.

It is an amenable number.

249999885 is a deficient number, since it is larger than the sum of its proper divisors (194444595).

249999885 is a wasteful number, since it uses less digits than its factorization.

249999885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851865 (or 1851859 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The square root of 249999885 is about 15811.3846642222. The cubic root of 249999885 is about 629.9604283535.

The spelling of 249999885 in words is "two hundred forty-nine million, nine hundred ninety-nine thousand, eight hundred eighty-five".