6557145 has 32 divisors (see below), whose sum is σ = 12089088. Its totient is φ = 2972928.

The previous prime is 6557123. The next prime is 6557153. The reversal of 6557145 is 5417556.

It is not a de Polignac number, because 6557145 - 2⁶ = 6557081 is a prime.

It is a Curzon number.

6557145 is a lucky 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 31 ways as a sum of consecutive naturals, for example, 20527 + ... + 20843.

It is an arithmetic number, because the mean of its divisors is an integer number (377784).

Almost surely, 2^6557145 is an apocalyptic number.

It is an amenable number.

6557145 is a deficient number, since it is larger than the sum of its proper divisors (5531943).

6557145 is a wasteful number, since it uses less digits than its factorization.

6557145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529.

The product of its digits is 21000, while the sum is 33.

The square root of 6557145 is about 2560.6922892062. The cubic root of 6557145 is about 187.1708714905.

The spelling of 6557145 in words is "six million, five hundred fifty-seven thousand, one hundred forty-five".