280925 has 12 divisors (see below), whose sum is σ = 369396. Its totient is φ = 211200.

The previous prime is 280921. The next prime is 280927. The reversal of 280925 is 529082.

280925 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 6 ways, for example, as 7396 + 273529 = 86^2 + 523^2 .

It is not a de Polignac number, because 280925 - 2² = 280921 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280894 and 280903.

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 280925.

It is not an unprimeable number, because it can be changed into a prime (280921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95 + ... + 755.

It is an arithmetic number, because the mean of its divisors is an integer number (30783).

2²⁸⁰⁹²⁵ is an apocalyptic number.

280925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

280925 is a deficient number, since it is larger than the sum of its proper divisors (88471).

280925 is a wasteful number, since it uses less digits than its factorization.

280925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 683 counting only the distinct ones).

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

The square root of 280925 is about 530.0235843809. The cubic root of 280925 is about 65.4932883592.

It can be divided in two parts, 2809 and 25, that multiplied together give a square (70225 = 265²).

The spelling of 280925 in words is "two hundred eighty thousand, nine hundred twenty-five".