281147 has 4 divisors (see below), whose sum is σ = 282480. Its totient is φ = 279816.

The previous prime is 281131. The next prime is 281153. The reversal of 281147 is 741182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 281147 - 2⁴ = 281131 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281147.

It is not an unprimeable number, because it can be changed into a prime (281117) 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, 272 + ... + 797.

It is an arithmetic number, because the mean of its divisors is an integer number (70620).

2²⁸¹¹⁴⁷ is an apocalyptic number.

281147 is a deficient number, since it is larger than the sum of its proper divisors (1333).

281147 is a wasteful number, since it uses less digits than its factorization.

281147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332.

The product of its digits is 448, while the sum is 23.

The square root of 281147 is about 530.2329676661. The cubic root of 281147 is about 65.5105357642.

The spelling of 281147 in words is "two hundred eighty-one thousand, one hundred forty-seven".