281343 has 8 divisors (see below), whose sum is σ = 377856. Its totient is φ = 186200.

The previous prime is 281339. The next prime is 281353. The reversal of 281343 is 343182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 281343 - 2² = 281339 is a prime.

It is a plaindrome in base 16.

It is a zygodrome in base 5.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281343.

It is not an unprimeable number, because it can be changed into a prime (281353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328 + ... + 818.

It is an arithmetic number, because the mean of its divisors is an integer number (47232).

2²⁸¹³⁴³ is an apocalyptic number.

281343 is a deficient number, since it is larger than the sum of its proper divisors (96513).

281343 is a wasteful number, since it uses less digits than its factorization.

281343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685.

The product of its digits is 576, while the sum is 21.

The square root of 281343 is about 530.4177598837. The cubic root of 281343 is about 65.5257556579.

Multiplying 281343 by its sum of digits (21), we get a triangular number (5908203 = T₃₄₃₇).

The spelling of 281343 in words is "two hundred eighty-one thousand, three hundred forty-three".