281875 has 20 divisors (see below), whose sum is σ = 393624. Its totient is φ = 200000.

The previous prime is 281867. The next prime is 281887. The reversal of 281875 is 578182.

281875 is nontrivially palindromic in base 13.

It is not a de Polignac number, because 281875 - 2³ = 281867 is a prime.

It is a d-powerful number, because it can be written as 2 + 8⁴ + 8⁶ + 1 + 7 + 5⁶ .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6855 + ... + 6895.

2²⁸¹⁸⁷⁵ is an apocalyptic number.

281875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

281875 is a deficient number, since it is larger than the sum of its proper divisors (111749).

281875 is an equidigital number, since it uses as much as digits as its factorization.

281875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 57 counting only the distinct ones).

The product of its digits is 4480, while the sum is 31.

The square root of 281875 is about 530.9190145399. The cubic root of 281875 is about 65.5670311978.

It can be divided in two parts, 281 and 875, that added together give a square (1156 = 34²).

The spelling of 281875 in words is "two hundred eighty-one thousand, eight hundred seventy-five".