281056 has 12 divisors (see below), whose sum is σ = 553392. Its totient is φ = 140512.

The previous prime is 281053. The next prime is 281063. The reversal of 281056 is 650182.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281053) 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 as a sum of consecutive naturals, namely, 4360 + ... + 4423.

It is an arithmetic number, because the mean of its divisors is an integer number (46116).

2²⁸¹⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

281056 is a deficient number, since it is larger than the sum of its proper divisors (272336).

281056 is an equidigital number, since it uses as much as digits as its factorization.

281056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8793 (or 8785 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 281056 is about 530.1471493840. The cubic root of 281056 is about 65.5034669804.

The spelling of 281056 in words is "two hundred eighty-one thousand, fifty-six".