249278 has 8 divisors (see below), whose sum is σ = 377568. Its totient is φ = 123424.

The previous prime is 249257. The next prime is 249287. The reversal of 249278 is 872942.

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

It is a d-powerful number, because it can be written as 2⁵ + 4 + 2¹⁷ + 9 + 7⁶ + 8³ .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

249278 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 326 + ... + 777.

It is an arithmetic number, because the mean of its divisors is an integer number (47196).

2²⁴⁹²⁷⁸ is an apocalyptic number.

249278 is a deficient number, since it is larger than the sum of its proper divisors (128290).

249278 is a wasteful number, since it uses less digits than its factorization.

249278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218.

The product of its digits is 8064, while the sum is 32.

The square root of 249278 is about 499.2774779619. The cubic root of 249278 is about 62.9353498209.

It can be divided in two parts, 2492 and 78, that multiplied together give a triangular number (194376 = T₆₂₃).

The spelling of 249278 in words is "two hundred forty-nine thousand, two hundred seventy-eight".