281994 has 16 divisors (see below), whose sum is σ = 577632. Its totient is φ = 91728.

The previous prime is 281993. The next prime is 282001. The reversal of 281994 is 499182.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281994.

It is not an unprimeable number, because it can be changed into a prime (281993) 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, 289 + ... + 804.

It is an arithmetic number, because the mean of its divisors is an integer number (36102).

2²⁸¹⁹⁹⁴ is an apocalyptic number.

281994 is an abundant number, since it is smaller than the sum of its proper divisors (295638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281994 is a wasteful number, since it uses less digits than its factorization.

281994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its digits is 5184, while the sum is 33.

The square root of 281994 is about 531.0310725372. The cubic root of 281994 is about 65.5762567753.

Subtracting from 281994 its sum of digits (33), we obtain a square (281961 = 531²).

It can be divided in two parts, 28199 and 4, that added together give a triangular number (28203 = T₂₃₇).

The spelling of 281994 in words is "two hundred eighty-one thousand, nine hundred ninety-four".