281004 has 12 divisors (see below), whose sum is σ = 655704. Its totient is φ = 93664.

The previous prime is 280997. The next prime is 281023. The reversal of 281004 is 400182.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281004.

It is an unprimeable number.

281004 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, 11697 + ... + 11720.

It is an arithmetic number, because the mean of its divisors is an integer number (54642).

2²⁸¹⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

281004 is an abundant number, since it is smaller than the sum of its proper divisors (374700).

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

281004 is a wasteful number, since it uses less digits than its factorization.

281004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23424 (or 23422 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 281004 is about 530.0981041279. The cubic root of 281004 is about 65.4994269903.

Adding to 281004 its reverse (400182), we get a palindrome (681186).

The spelling of 281004 in words is "two hundred eighty-one thousand, four".