6397257 has 4 divisors (see below), whose sum is σ = 8529680. Its totient is φ = 4264836.

The previous prime is 6397229. The next prime is 6397273. The reversal of 6397257 is 7527936.

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.

It is not a de Polignac number, because 6397257 - 2¹¹ = 6395209 is a prime.

It is a D-number.

It is a Duffinian number.

6397257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6397057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066207 + ... + 1066212.

It is an arithmetic number, because the mean of its divisors is an integer number (2132420).

Almost surely, 2^6397257 is an apocalyptic number.

It is an amenable number.

6397257 is a deficient number, since it is larger than the sum of its proper divisors (2132423).

6397257 is a wasteful number, since it uses less digits than its factorization.

6397257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132422.

The product of its digits is 79380, while the sum is 39.

The square root of 6397257 is about 2529.2799370572. The cubic root of 6397257 is about 185.6370248080.

The spelling of 6397257 in words is "six million, three hundred ninety-seven thousand, two hundred fifty-seven".