6557245 has 4 divisors (see below), whose sum is σ = 7868700. Its totient is φ = 5245792.

The previous prime is 6557233. The next prime is 6557279. The reversal of 6557245 is 5427556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1633284 + 4923961 = 1278^2 + 2219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6557245 is a prime.

6557245 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6557245.

It is a congruent number.

It is an unprimeable number.

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, 655720 + ... + 655729.

It is an arithmetic number, because the mean of its divisors is an integer number (1967175).

Almost surely, 2^6557245 is an apocalyptic number.

It is an amenable number.

6557245 is a deficient number, since it is larger than the sum of its proper divisors (1311455).

6557245 is a wasteful number, since it uses less digits than its factorization.

6557245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311454.

The product of its digits is 42000, while the sum is 34.

The square root of 6557245 is about 2560.7118151014. The cubic root of 6557245 is about 187.1718229713.

The spelling of 6557245 in words is "six million, five hundred fifty-seven thousand, two hundred forty-five".