281906 has 8 divisors (see below), whose sum is σ = 432000. Its totient is φ = 137908.

The previous prime is 281893. The next prime is 281921. The reversal of 281906 is 609182.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406 + ... + 1593.

It is an arithmetic number, because the mean of its divisors is an integer number (54000).

2²⁸¹⁹⁰⁶ is an apocalyptic number.

281906 is a deficient number, since it is larger than the sum of its proper divisors (150094).

281906 is a wasteful number, since it uses less digits than its factorization.

281906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 281906 is about 530.9482083970. The cubic root of 281906 is about 65.5694347495.

The spelling of 281906 in words is "two hundred eighty-one thousand, nine hundred six".