280325 has 6 divisors (see below), whose sum is σ = 347634. Its totient is φ = 224240.

The previous prime is 280321. The next prime is 280327. The reversal of 280325 is 523082.

It can be written as a sum of positive squares in 3 ways, for example, as 484 + 279841 = 22^2 + 529^2 .

It is not a de Polignac number, because 280325 - 2² = 280321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280297 and 280306.

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 280325.

It is not an unprimeable number, because it can be changed into a prime (280321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5582 + ... + 5631.

It is an arithmetic number, because the mean of its divisors is an integer number (57939).

2²⁸⁰³²⁵ is an apocalyptic number.

280325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

280325 is a deficient number, since it is larger than the sum of its proper divisors (67309).

280325 is a wasteful number, since it uses less digits than its factorization.

280325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11223 (or 11218 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 280325 is about 529.4572692862. The cubic root of 280325 is about 65.4466282395.

The spelling of 280325 in words is "two hundred eighty thousand, three hundred twenty-five".