281485 has 8 divisors (see below), whose sum is σ = 355680. Its totient is φ = 213264.

The previous prime is 281431. The next prime is 281509. The reversal of 281485 is 584182.

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 281485 - 2⁷ = 281357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1387 + ... + 1576.

It is an arithmetic number, because the mean of its divisors is an integer number (44460).

2²⁸¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

281485 is a deficient number, since it is larger than the sum of its proper divisors (74195).

281485 is a wasteful number, since it uses less digits than its factorization.

281485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987.

The product of its digits is 2560, while the sum is 28.

The square root of 281485 is about 530.5515997526. The cubic root of 281485 is about 65.5367779004.

The spelling of 281485 in words is "two hundred eighty-one thousand, four hundred eighty-five".