281293 has 4 divisors (see below), whose sum is σ = 284128. Its totient is φ = 278460.

The previous prime is 281291. The next prime is 281297. The reversal of 281293 is 392182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 281293 - 2¹ = 281291 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1263 + ... + 1468.

It is an arithmetic number, because the mean of its divisors is an integer number (71032).

2²⁸¹²⁹³ is an apocalyptic number.

It is an amenable number.

281293 is a deficient number, since it is larger than the sum of its proper divisors (2835).

281293 is a wasteful number, since it uses less digits than its factorization.

281293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834.

The product of its digits is 864, while the sum is 25.

The square root of 281293 is about 530.3706251293. The cubic root of 281293 is about 65.5218737037.

Subtracting 281293 from its reverse (392182), we obtain a square (110889 = 333²).

The spelling of 281293 in words is "two hundred eighty-one thousand, two hundred ninety-three".