6557257 has 8 divisors (see below), whose sum is σ = 7934976. Its totient is φ = 5289792.

The previous prime is 6557233. The next prime is 6557279. The reversal of 6557257 is 7527556.

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

It is a cyclic number.

It is not a de Polignac number, because 6557257 - 2¹⁵ = 6524489 is a prime.

It is a d-powerful number, because it can be written as 6⁵ + 5⁵ + 5⁸ + 7² + 2⁸ + 5⁸ + 7⁸ .

It is not an unprimeable number, because it can be changed into a prime (6557207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27433 + ... + 27670.

It is an arithmetic number, because the mean of its divisors is an integer number (991872).

Almost surely, 2^6557257 is an apocalyptic number.

It is an amenable number.

6557257 is a deficient number, since it is larger than the sum of its proper divisors (1377719).

6557257 is a wasteful number, since it uses less digits than its factorization.

6557257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55127.

The product of its digits is 73500, while the sum is 37.

The square root of 6557257 is about 2560.7141581988. The cubic root of 6557257 is about 187.1719371483.

Subtracting 6557257 from its reverse (7527556), we obtain a cube (970299 = 99³).

The spelling of 6557257 in words is "six million, five hundred fifty-seven thousand, two hundred fifty-seven".