281135 has 8 divisors (see below), whose sum is σ = 343440. Its totient is φ = 220864.

The previous prime is 281131. The next prime is 281153. The reversal of 281135 is 531182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 281135 - 2² = 281131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182 + ... + 771.

It is an arithmetic number, because the mean of its divisors is an integer number (42930).

2²⁸¹¹³⁵ is an apocalyptic number.

281135 is a deficient number, since it is larger than the sum of its proper divisors (62305).

281135 is an equidigital number, since it uses as much as digits as its factorization.

281135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017.

The product of its digits is 240, while the sum is 20.

The square root of 281135 is about 530.2216517646. The cubic root of 281135 is about 65.5096037042.

Subtracting 281135 from its reverse (531182), we obtain a cube (250047 = 63³).

The spelling of 281135 in words is "two hundred eighty-one thousand, one hundred thirty-five".