6487257 has 12 divisors (see below), whose sum is σ = 10062096. Its totient is φ = 3706920.

The previous prime is 6487223. The next prime is 6487259. The reversal of 6487257 is 7527846.

It is not a de Polignac number, because 6487257 - 2⁸ = 6487001 is a prime.

It is a d-powerful number, because it can be written as 6 + 4⁸ + 8⁴ + 7² + 2¹⁸ + 5⁸ + 7⁸ .

6487257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6487259) 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, 21919 + ... + 22212.

It is an arithmetic number, because the mean of its divisors is an integer number (838508).

Almost surely, 2^6487257 is an apocalyptic number.

It is an amenable number.

6487257 is a deficient number, since it is larger than the sum of its proper divisors (3574839).

6487257 is a wasteful number, since it uses less digits than its factorization.

6487257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44148 (or 44141 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 6487257 is about 2547.0094228330. The cubic root of 6487257 is about 186.5035206469.

The spelling of 6487257 in words is "six million, four hundred eighty-seven thousand, two hundred fifty-seven".