281090 has 8 divisors (see below), whose sum is σ = 505980. Its totient is φ = 112432.

The previous prime is 281081. The next prime is 281117. The reversal of 281090 is 90182.

It can be written as a sum of positive squares in 2 ways, for example, as 231361 + 49729 = 481^2 + 223^2 .

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

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 281090.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14045 + ... + 14064.

2²⁸¹⁰⁹⁰ is an apocalyptic number.

281090 is a deficient number, since it is larger than the sum of its proper divisors (224890).

281090 is a wasteful number, since it uses less digits than its factorization.

281090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28116.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 281090 is about 530.1792149830. The cubic root of 281090 is about 65.5061082430.

The spelling of 281090 in words is "two hundred eighty-one thousand, ninety".