1255641218 has 16 divisors (see below), whose sum is σ = 2034485376. Its totient is φ = 577771920.

The previous prime is 1255641119. The next prime is 1255641223. The reversal of 1255641218 is 8121465521.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64346 + ... + 81557.

It is an arithmetic number, because the mean of its divisors is an integer number (127155336).

Almost surely, 2^1255641218 is an apocalyptic number.

1255641218 is a deficient number, since it is larger than the sum of its proper divisors (778844158).

1255641218 is a wasteful number, since it uses less digits than its factorization.

1255641218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146249.

The product of its digits is 19200, while the sum is 35.

The square root of 1255641218 is about 35435.0281219022. The cubic root of 1255641218 is about 1078.8353981412.

The spelling of 1255641218 in words is "one billion, two hundred fifty-five million, six hundred forty-one thousand, two hundred eighteen".