281136 has 20 divisors (see below), whose sum is σ = 726392. Its totient is φ = 93696.

The previous prime is 281131. The next prime is 281153. The reversal of 281136 is 631182.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281136.

It is not an unprimeable number, because it can be changed into a prime (281131) by changing a digit.

281136 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2881 + ... + 2976.

2²⁸¹¹³⁶ is an apocalyptic number.

It is an amenable number.

281136 is an abundant number, since it is smaller than the sum of its proper divisors (445256).

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

281136 is a wasteful number, since it uses less digits than its factorization.

281136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5868 (or 5862 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 281136 is about 530.2225947656. Note that the first 3 decimals coincide. The cubic root of 281136 is about 65.5096813769.

The spelling of 281136 in words is "two hundred eighty-one thousand, one hundred thirty-six".