397205 has 8 divisors (see below), whose sum is σ = 504792. Its totient is φ = 299008.

The previous prime is 397183. The next prime is 397211. The reversal of 397205 is 502793.

It can be written as a sum of positive squares in 4 ways, for example, as 188356 + 208849 = 434^2 + 457^2 .

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 397205 - 2¹⁰ = 396181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2252 + ... + 2421.

It is an arithmetic number, because the mean of its divisors is an integer number (63099).

2³⁹⁷²⁰⁵ is an apocalyptic number.

It is an amenable number.

397205 is a deficient number, since it is larger than the sum of its proper divisors (107587).

397205 is a wasteful number, since it uses less digits than its factorization.

397205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 397205 is about 630.2420170062. The cubic root of 397205 is about 73.5086142278.

Adding to 397205 its reverse (502793), we get a palindrome (899998).

The spelling of 397205 in words is "three hundred ninety-seven thousand, two hundred five".