397457 has 4 divisors (see below), whose sum is σ = 399360. Its totient is φ = 395556.

The previous prime is 397433. The next prime is 397459. The reversal of 397457 is 754793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 754793 = 13 ⋅58061.

It is a cyclic number.

It is not a de Polignac number, because 397457 - 2¹² = 393361 is a prime.

It is a d-powerful number, because it can be written as 3 + 9³ + 4⁹ + 7⁵ + 5³ + 7⁶ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593 + ... + 1070.

It is an arithmetic number, because the mean of its divisors is an integer number (99840).

2³⁹⁷⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

397457 is a deficient number, since it is larger than the sum of its proper divisors (1903).

397457 is a wasteful number, since it uses less digits than its factorization.

397457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902.

The product of its digits is 26460, while the sum is 35.

The square root of 397457 is about 630.4419085055. The cubic root of 397457 is about 73.5241563742.

The spelling of 397457 in words is "three hundred ninety-seven thousand, four hundred fifty-seven".