396281 has 4 divisors (see below), whose sum is σ = 403812. Its totient is φ = 388752.

The previous prime is 396269. The next prime is 396293. The reversal of 396281 is 182693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182693 = 7 ⋅26099.

It is an interprime number because it is at equal distance from previous prime (396269) and next prime (396293).

It can be written as a sum of positive squares in 2 ways, for example, as 341056 + 55225 = 584^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 396281 - 2⁶ = 396217 is a prime.

It is a super-2 number, since 2×396281² = 314077261922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 396281.

It is not an unprimeable number, because it can be changed into a prime (396181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3686 + ... + 3791.

It is an arithmetic number, because the mean of its divisors is an integer number (100953).

2³⁹⁶²⁸¹ is an apocalyptic number.

It is an amenable number.

396281 is a deficient number, since it is larger than the sum of its proper divisors (7531).

396281 is an equidigital number, since it uses as much as digits as its factorization.

396281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7530.

The product of its digits is 2592, while the sum is 29.

The square root of 396281 is about 629.5085384647. The cubic root of 396281 is about 73.4515700520.

The spelling of 396281 in words is "three hundred ninety-six thousand, two hundred eighty-one".