249686 has 8 divisors (see below), whose sum is σ = 377784. Its totient is φ = 123760.

The previous prime is 249677. The next prime is 249703. The reversal of 249686 is 686942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

249686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215 + ... + 738.

It is an arithmetic number, because the mean of its divisors is an integer number (47223).

2²⁴⁹⁶⁸⁶ is an apocalyptic number.

249686 is a deficient number, since it is larger than the sum of its proper divisors (128098).

249686 is a wasteful number, since it uses less digits than its factorization.

249686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its digits is 20736, while the sum is 35.

The square root of 249686 is about 499.6859013420. The cubic root of 249686 is about 62.9696670977.

The spelling of 249686 in words is "two hundred forty-nine thousand, six hundred eighty-six".