278259 has 4 divisors (see below), whose sum is σ = 371016. Its totient is φ = 185504.

The previous prime is 278237. The next prime is 278261. The reversal of 278259 is 952872.

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

It is a cyclic number.

It is not a de Polignac number, because 278259 - 2⁵ = 278227 is a prime.

It is a d-powerful number, because it can be written as 2 + 7³ + 2¹⁸ + 8² + 5⁶ + 9² .

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 278259.

It is not an unprimeable number, because it can be changed into a prime (278209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46374 + ... + 46379.

It is an arithmetic number, because the mean of its divisors is an integer number (92754).

2²⁷⁸²⁵⁹ is an apocalyptic number.

278259 is a deficient number, since it is larger than the sum of its proper divisors (92757).

278259 is an equidigital number, since it uses as much as digits as its factorization.

278259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92756.

The product of its digits is 10080, while the sum is 33.

The square root of 278259 is about 527.5026066286. The cubic root of 278259 is about 65.2854507085.

The spelling of 278259 in words is "two hundred seventy-eight thousand, two hundred fifty-nine".