281125 has 16 divisors (see below), whose sum is σ = 380016. Its totient is φ = 206400.

The previous prime is 281117. The next prime is 281131. The reversal of 281125 is 521182.

It can be written as a sum of positive squares in 8 ways, for example, as 79524 + 201601 = 282^2 + 449^2 .

It is not a de Polignac number, because 281125 - 2³ = 281117 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1539 + ... + 1711.

It is an arithmetic number, because the mean of its divisors is an integer number (23751).

2²⁸¹¹²⁵ is an apocalyptic number.

281125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

281125 is a deficient number, since it is larger than the sum of its proper divisors (98891).

281125 is a wasteful number, since it uses less digits than its factorization.

281125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 191 counting only the distinct ones).

The product of its digits is 160, while the sum is 19.

The square root of 281125 is about 530.2122216622. The cubic root of 281125 is about 65.5088269673.

It can be divided in two parts, 281 and 125, that added together give a triangular number (406 = T₂₈).

The spelling of 281125 in words is "two hundred eighty-one thousand, one hundred twenty-five".