249901 has 4 divisors (see below), whose sum is σ = 251100. Its totient is φ = 248704.

The previous prime is 249881. The next prime is 249911. The reversal of 249901 is 109942.

249901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9801 + 240100 = 99^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 249901 - 2¹¹ = 247853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196 + ... + 733.

It is an arithmetic number, because the mean of its divisors is an integer number (62775).

2²⁴⁹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

249901 is a deficient number, since it is larger than the sum of its proper divisors (1199).

249901 is an equidigital number, since it uses as much as digits as its factorization.

249901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 249901 is about 499.9009901971. The cubic root of 249901 is about 62.9877359179.

The spelling of 249901 in words is "two hundred forty-nine thousand, nine hundred one".