249455 has 4 divisors (see below), whose sum is σ = 299352. Its totient is φ = 199560.

The previous prime is 249449. The next prime is 249463. The reversal of 249455 is 554942.

It is a happy number.

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

It is not a de Polignac number, because 249455 - 2⁴ = 249439 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 24941 + ... + 24950.

It is an arithmetic number, because the mean of its divisors is an integer number (74838).

2²⁴⁹⁴⁵⁵ is an apocalyptic number.

249455 is a deficient number, since it is larger than the sum of its proper divisors (49897).

249455 is an equidigital number, since it uses as much as digits as its factorization.

249455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49896.

The product of its digits is 7200, while the sum is 29.

The square root of 249455 is about 499.4547026508. The cubic root of 249455 is about 62.9502420582.

The spelling of 249455 in words is "two hundred forty-nine thousand, four hundred fifty-five".