281242 has 16 divisors (see below), whose sum is σ = 471240. Its totient is φ = 124992.

The previous prime is 281233. The next prime is 281243. The reversal of 281242 is 242182.

It can be written as a sum of positive squares in 4 ways, for example, as 203401 + 77841 = 451^2 + 279^2 .

It is not an unprimeable number, because it can be changed into a prime (281243) 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, 568 + ... + 940.

2²⁸¹²⁴² is an apocalyptic number.

281242 is a deficient number, since it is larger than the sum of its proper divisors (189998).

281242 is a wasteful number, since it uses less digits than its factorization.

281242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417.

The product of its digits is 256, while the sum is 19.

The square root of 281242 is about 530.3225433639. The cubic root of 281242 is about 65.5179136366.

Subtracting from 281242 its reverse (242182), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 281242 in words is "two hundred eighty-one thousand, two hundred forty-two".