281224 has 8 divisors (see below), whose sum is σ = 527310. Its totient is φ = 140608.

The previous prime is 281207. The next prime is 281227. The reversal of 281224 is 422182.

It can be written as a sum of positive squares in only one way, i.e., 280900 + 324 = 530^2 + 18^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (281227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17569 + ... + 17584.

2²⁸¹²²⁴ is an apocalyptic number.

It is an amenable number.

281224 is a deficient number, since it is larger than the sum of its proper divisors (246086).

281224 is a wasteful number, since it uses less digits than its factorization.

281224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35159 (or 35155 counting only the distinct ones).

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

The square root of 281224 is about 530.3055722883. The cubic root of 281224 is about 65.5165158515.

It can be divided in two parts, 281 and 224, that added together give a palindrome (505).

The spelling of 281224 in words is "two hundred eighty-one thousand, two hundred twenty-four".