280975 has 6 divisors (see below), whose sum is σ = 348440. Its totient is φ = 224760.

The previous prime is 280967. The next prime is 280979. The reversal of 280975 is 579082.

It is not a de Polignac number, because 280975 - 2³ = 280967 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5595 + ... + 5644.

2²⁸⁰⁹⁷⁵ is an apocalyptic number.

280975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

280975 is a deficient number, since it is larger than the sum of its proper divisors (67465).

280975 is a wasteful number, since it uses less digits than its factorization.

280975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11249 (or 11244 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 280975 is about 530.0707499948. The cubic root of 280975 is about 65.4971737024.

The spelling of 280975 in words is "two hundred eighty thousand, nine hundred seventy-five".