281842 has 16 divisors (see below), whose sum is σ = 482112. Its totient is φ = 122320.

The previous prime is 281839. The next prime is 281849. The reversal of 281842 is 248182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281849) 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, 228 + ... + 784.

It is an arithmetic number, because the mean of its divisors is an integer number (30132).

2²⁸¹⁸⁴² is an apocalyptic number.

281842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

281842 is a deficient number, since it is larger than the sum of its proper divisors (200270).

281842 is a wasteful number, since it uses less digits than its factorization.

281842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its digits is 1024, while the sum is 25.

The square root of 281842 is about 530.8879354440. The cubic root of 281842 is about 65.5644723845.

The spelling of 281842 in words is "two hundred eighty-one thousand, eight hundred forty-two".