8397257 has 8 divisors (see below), whose sum is σ = 9181920. Its totient is φ = 7616160.

The previous prime is 8397227. The next prime is 8397283. The reversal of 8397257 is 7527938.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8397257 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 8³ + 3⁷ + 9² + 7³ + 2²³ + 5⁵ + 7⁴ .

It is not an unprimeable number, because it can be changed into a prime (8397217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7613 + ... + 8645.

It is an arithmetic number, because the mean of its divisors is an integer number (1147740).

Almost surely, 2^8397257 is an apocalyptic number.

It is an amenable number.

8397257 is a deficient number, since it is larger than the sum of its proper divisors (784663).

8397257 is a wasteful number, since it uses less digits than its factorization.

8397257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783.

The product of its digits is 105840, while the sum is 41.

The square root of 8397257 is about 2897.8020981427. The cubic root of 8397257 is about 203.2571421667.

The spelling of 8397257 in words is "eight million, three hundred ninety-seven thousand, two hundred fifty-seven".