280259 has 4 divisors (see below), whose sum is σ = 320304. Its totient is φ = 240216.

The previous prime is 280253. The next prime is 280277. The reversal of 280259 is 952082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 952082 = 2 ⋅476041.

It is a cyclic number.

It is not a de Polignac number, because 280259 - 2⁴ = 280243 is a prime.

It is a Duffinian 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 280259.

It is not an unprimeable number, because it can be changed into a prime (280253) 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, 20012 + ... + 20025.

It is an arithmetic number, because the mean of its divisors is an integer number (80076).

2²⁸⁰²⁵⁹ is an apocalyptic number.

280259 is a deficient number, since it is larger than the sum of its proper divisors (40045).

280259 is an equidigital number, since it uses as much as digits as its factorization.

280259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40044.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 280259 is about 529.3949376411. The cubic root of 280259 is about 65.4414915630.

The spelling of 280259 in words is "two hundred eighty thousand, two hundred fifty-nine".