249555 has 16 divisors (see below), whose sum is σ = 405504. Its totient is φ = 131040.

The previous prime is 249541. The next prime is 249563. The reversal of 249555 is 555942.

It is a happy number.

It is not a de Polignac number, because 249555 - 2⁴ = 249539 is a prime.

249555 is a lucky 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 249555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1840 + ... + 1970.

It is an arithmetic number, because the mean of its divisors is an integer number (25344).

2²⁴⁹⁵⁵⁵ is an apocalyptic number.

249555 is a deficient number, since it is larger than the sum of its proper divisors (155949).

249555 is a wasteful number, since it uses less digits than its factorization.

249555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266.

The product of its digits is 9000, while the sum is 30.

The square root of 249555 is about 499.5548017986. The cubic root of 249555 is about 62.9586526376.

The spelling of 249555 in words is "two hundred forty-nine thousand, five hundred fifty-five".