1265055180 has 24 divisors (see below), whose sum is σ = 3542154672. Its totient is φ = 337348032.

The previous prime is 1265055163. The next prime is 1265055217. The reversal of 1265055180 is 815505621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10542067 + ... + 10542186.

It is an arithmetic number, because the mean of its divisors is an integer number (147589778).

Almost surely, 2^1265055180 is an apocalyptic number.

1265055180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265055180 is an abundant number, since it is smaller than the sum of its proper divisors (2277099492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265055180 is a wasteful number, since it uses less digits than its factorization.

1265055180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21084265 (or 21084263 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 1265055180 is about 35567.6142016863. The cubic root of 1265055180 is about 1081.5248180235.

The spelling of 1265055180 in words is "one billion, two hundred sixty-five million, fifty-five thousand, one hundred eighty".