397557 has 12 divisors (see below), whose sum is σ = 579904. Its totient is φ = 262440.

The previous prime is 397549. The next prime is 397567. The reversal of 397557 is 755793.

It is not a de Polignac number, because 397557 - 2³ = 397549 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1332 + ... + 1602.

2³⁹⁷⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

397557 is a deficient number, since it is larger than the sum of its proper divisors (182347).

397557 is a wasteful number, since it uses less digits than its factorization.

397557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 437 counting only the distinct ones).

The product of its digits is 33075, while the sum is 36.

The square root of 397557 is about 630.5212129659. The cubic root of 397557 is about 73.5303220719.

The spelling of 397557 in words is "three hundred ninety-seven thousand, five hundred fifty-seven".