281397 has 8 divisors (see below), whose sum is σ = 379456. Its totient is φ = 185472.

The previous prime is 281381. The next prime is 281419. The reversal of 281397 is 793182.

It is a happy number.

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

It is not a de Polignac number, because 281397 - 2⁴ = 281381 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 281397.

It is not an unprimeable number, because it can be changed into a prime (281317) 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, 193 + ... + 774.

It is an arithmetic number, because the mean of its divisors is an integer number (47432).

2²⁸¹³⁹⁷ is an apocalyptic number.

It is an amenable number.

281397 is a deficient number, since it is larger than the sum of its proper divisors (98059).

281397 is an equidigital number, since it uses as much as digits as its factorization.

281397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067.

The product of its digits is 3024, while the sum is 30.

The square root of 281397 is about 530.4686607143. The cubic root of 281397 is about 65.5299476518.

The spelling of 281397 in words is "two hundred eighty-one thousand, three hundred ninety-seven".