281236 has 6 divisors (see below), whose sum is σ = 492170. Its totient is φ = 140616.

The previous prime is 281233. The next prime is 281243. The reversal of 281236 is 632182.

It can be written as a sum of positive squares in only one way, i.e., 197136 + 84100 = 444^2 + 290^2 .

It is a d-powerful number, because it can be written as 2⁵ + 8³ + 2⁹ + 1 + 3⁵ + 6⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35151 + ... + 35158.

2²⁸¹²³⁶ is an apocalyptic number.

It is an amenable number.

281236 is a deficient number, since it is larger than the sum of its proper divisors (210934).

281236 is a wasteful number, since it uses less digits than its factorization.

281236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70313 (or 70311 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 281236 is about 530.3168863991. The cubic root of 281236 is about 65.5174477148.

The spelling of 281236 in words is "two hundred eighty-one thousand, two hundred thirty-six".