249655 has 12 divisors (see below), whose sum is σ = 348840. Its totient is φ = 171024.

The previous prime is 249647. The next prime is 249659. The reversal of 249655 is 556942.

It is not a de Polignac number, because 249655 - 2³ = 249647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249659) 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 11 ways as a sum of consecutive naturals, for example, 265 + ... + 754.

It is an arithmetic number, because the mean of its divisors is an integer number (29070).

2²⁴⁹⁶⁵⁵ is an apocalyptic number.

249655 is a deficient number, since it is larger than the sum of its proper divisors (99185).

249655 is a wasteful number, since it uses less digits than its factorization.

249655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1031 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 249655 is about 499.6548808928. The cubic root of 249655 is about 62.9670609704.

The spelling of 249655 in words is "two hundred forty-nine thousand, six hundred fifty-five".