397257 has 8 divisors (see below), whose sum is σ = 605376. Its totient is φ = 226992.

The previous prime is 397253. The next prime is 397259. The reversal of 397257 is 752793.

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

It is not a de Polignac number, because 397257 - 2² = 397253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397253) 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, 9438 + ... + 9479.

It is an arithmetic number, because the mean of its divisors is an integer number (75672).

2³⁹⁷²⁵⁷ is an apocalyptic number.

It is an amenable number.

397257 is a deficient number, since it is larger than the sum of its proper divisors (208119).

397257 is a wasteful number, since it uses less digits than its factorization.

397257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18927.

The product of its digits is 13230, while the sum is 33.

The square root of 397257 is about 630.2832696494. The cubic root of 397257 is about 73.5118218756.

The spelling of 397257 in words is "three hundred ninety-seven thousand, two hundred fifty-seven".