280425 has 12 divisors (see below), whose sum is σ = 463760. Its totient is φ = 149520.

The previous prime is 280411. The next prime is 280451. The reversal of 280425 is 524082.

It is not a de Polignac number, because 280425 - 2⁴ = 280409 is a prime.

280425 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280425.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1795 + ... + 1944.

2²⁸⁰⁴²⁵ is an apocalyptic number.

280425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

280425 is a deficient number, since it is larger than the sum of its proper divisors (183335).

280425 is a wasteful number, since it uses less digits than its factorization.

280425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3752 (or 3747 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 280425 is about 529.5516971930. The cubic root of 280425 is about 65.4544095466.

The spelling of 280425 in words is "two hundred eighty thousand, four hundred twenty-five".