249566 has 4 divisors (see below), whose sum is σ = 374352. Its totient is φ = 124782.

The previous prime is 249563. The next prime is 249583. The reversal of 249566 is 665942.

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

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249566.

It is not an unprimeable number, because it can be changed into a prime (249563) 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 as a sum of consecutive naturals, namely, 62390 + ... + 62393.

It is an arithmetic number, because the mean of its divisors is an integer number (93588).

2²⁴⁹⁵⁶⁶ is an apocalyptic number.

249566 is a deficient number, since it is larger than the sum of its proper divisors (124786).

249566 is a wasteful number, since it uses less digits than its factorization.

249566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124785.

The product of its digits is 12960, while the sum is 32.

The square root of 249566 is about 499.5658114803. The cubic root of 249566 is about 62.9595776641.

The spelling of 249566 in words is "two hundred forty-nine thousand, five hundred sixty-six".