397281 has 8 divisors (see below), whose sum is σ = 533824. Its totient is φ = 262800.

The previous prime is 397259. The next prime is 397283. The reversal of 397281 is 182793.

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 397281 - 2⁶ = 397217 is a prime.

It is a super-2 number, since 2×397281² = 315664385922, which contains 22 as substring.

It is a Duffinian number.

397281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (397283) 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, 15 + ... + 891.

It is an arithmetic number, because the mean of its divisors is an integer number (66728).

2³⁹⁷²⁸¹ is an apocalyptic number.

It is an amenable number.

397281 is a deficient number, since it is larger than the sum of its proper divisors (136543).

397281 is a wasteful number, since it uses less digits than its factorization.

397281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031.

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

The square root of 397281 is about 630.3023084203. The cubic root of 397281 is about 73.5133022340.

The spelling of 397281 in words is "three hundred ninety-seven thousand, two hundred eighty-one".