281399 has 4 divisors (see below), whose sum is σ = 282480. Its totient is φ = 280320.

The previous prime is 281381. The next prime is 281419. The reversal of 281399 is 993182.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 281399 - 2¹⁶ = 215863 is a prime.

It is a Duffinian number.

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 281399.

It is not an unprimeable number, because it can be changed into a prime (281339) 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, 119 + ... + 759.

It is an arithmetic number, because the mean of its divisors is an integer number (70620).

2²⁸¹³⁹⁹ is an apocalyptic number.

281399 is a deficient number, since it is larger than the sum of its proper divisors (1081).

281399 is an equidigital number, since it uses as much as digits as its factorization.

281399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080.

The product of its digits is 3888, while the sum is 32.

The square root of 281399 is about 530.4705458364. The cubic root of 281399 is about 65.5301029006.

The spelling of 281399 in words is "two hundred eighty-one thousand, three hundred ninety-nine".