281225 has 12 divisors (see below), whose sum is σ = 398784. Its totient is φ = 192720.

The previous prime is 281207. The next prime is 281227. The reversal of 281225 is 522182.

It is not a de Polignac number, because 281225 - 2¹⁶ = 215689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 281197 and 281206.

It is not an unprimeable number, because it can be changed into a prime (281227) 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 11 ways as a sum of consecutive naturals, for example, 629 + ... + 978.

It is an arithmetic number, because the mean of its divisors is an integer number (33232).

2²⁸¹²²⁵ is an apocalyptic number.

281225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

281225 is a deficient number, since it is larger than the sum of its proper divisors (117559).

281225 is a wasteful number, since it uses less digits than its factorization.

281225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1619 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 281225 is about 530.3065151401. The cubic root of 281225 is about 65.5165935078.

The spelling of 281225 in words is "two hundred eighty-one thousand, two hundred twenty-five".