249506 has 4 divisors (see below), whose sum is σ = 374262. Its totient is φ = 124752.

The previous prime is 249503. The next prime is 249517. The reversal of 249506 is 605942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605942 = 2 ⋅302971.

It can be written as a sum of positive squares in only one way, i.e., 133225 + 116281 = 365^2 + 341^2 .

It is not an unprimeable number, because it can be changed into a prime (249503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62375 + ... + 62378.

2²⁴⁹⁵⁰⁶ is an apocalyptic number.

249506 is a deficient number, since it is larger than the sum of its proper divisors (124756).

249506 is a wasteful number, since it uses less digits than its factorization.

249506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124755.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 249506 is about 499.5057557226. The cubic root of 249506 is about 62.9545317345.

The spelling of 249506 in words is "two hundred forty-nine thousand, five hundred six".