281825 has 6 divisors (see below), whose sum is σ = 349494. Its totient is φ = 225440.

The previous prime is 281807. The next prime is 281833. The reversal of 281825 is 528182.

281825 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 3 ways, for example, as 4096 + 277729 = 64^2 + 527^2 .

It is not a de Polignac number, because 281825 - 2⁶ = 281761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 281794 and 281803.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281825.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5612 + ... + 5661.

It is an arithmetic number, because the mean of its divisors is an integer number (58249).

2²⁸¹⁸²⁵ is an apocalyptic number.

281825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

281825 is a deficient number, since it is larger than the sum of its proper divisors (67669).

281825 is a wasteful number, since it uses less digits than its factorization.

281825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11283 (or 11278 counting only the distinct ones).

The product of its digits is 1280, while the sum is 26.

The square root of 281825 is about 530.8719242906. The cubic root of 281825 is about 65.5631541300.

The spelling of 281825 in words is "two hundred eighty-one thousand, eight hundred twenty-five".