281481 has 4 divisors (see below), whose sum is σ = 375312. Its totient is φ = 187652.

The previous prime is 281431. The next prime is 281509. The reversal of 281481 is 184182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 281481 - 2⁷ = 281353 is a prime.

It is a super-2 number, since 2×281481² = 158463106722, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281481.

It is not an unprimeable number, because it can be changed into a prime (281431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46911 + ... + 46916.

It is an arithmetic number, because the mean of its divisors is an integer number (93828).

2²⁸¹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

281481 is a deficient number, since it is larger than the sum of its proper divisors (93831).

281481 is an equidigital number, since it uses as much as digits as its factorization.

281481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93830.

The product of its digits is 512, while the sum is 24.

The square root of 281481 is about 530.5478300776. The cubic root of 281481 is about 65.5364674654.

The spelling of 281481 in words is "two hundred eighty-one thousand, four hundred eighty-one".