8645257 has 2 divisors, whose sum is σ = 8645258. Its totient is φ = 8645256.

The previous prime is 8645243. The next prime is 8645261. The reversal of 8645257 is 7525468.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8549776 + 95481 = 2924^2 + 309^2 .

It is a cyclic number.

It is not a de Polignac number, because 8645257 - 2¹¹ = 8643209 is a prime.

It is a d-powerful number, because it can be written as 8⁷ + 6 + 4⁵ + 5⁸ + 2¹⁰ + 5⁸ + 7⁸ .

It is not a weakly prime, because it can be changed into another prime (8645237) 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 as a sum of consecutive naturals, namely, 4322628 + 4322629.

It is an arithmetic number, because the mean of its divisors is an integer number (4322629).

Almost surely, 2^8645257 is an apocalyptic number.

It is an amenable number.

8645257 is a deficient number, since it is larger than the sum of its proper divisors (1).

8645257 is an equidigital number, since it uses as much as digits as its factorization.

8645257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 37.

The square root of 8645257 is about 2940.2817892168. The cubic root of 8645257 is about 205.2387224946.

The spelling of 8645257 in words is "eight million, six hundred forty-five thousand, two hundred fifty-seven".