249635 has 4 divisors (see below), whose sum is σ = 299568. Its totient is φ = 199704.

The previous prime is 249607. The next prime is 249647. The reversal of 249635 is 536942.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 249635 - 2¹⁴ = 233251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249598 and 249607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24959 + ... + 24968.

It is an arithmetic number, because the mean of its divisors is an integer number (74892).

2²⁴⁹⁶³⁵ is an apocalyptic number.

249635 is a deficient number, since it is larger than the sum of its proper divisors (49933).

249635 is an equidigital number, since it uses as much as digits as its factorization.

249635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49932.

The product of its digits is 6480, while the sum is 29.

The square root of 249635 is about 499.6348666777. The cubic root of 249635 is about 62.9653794835.

The spelling of 249635 in words is "two hundred forty-nine thousand, six hundred thirty-five".