1191505060 has 24 divisors (see below), whose sum is σ = 2560352256. Its totient is φ = 465517920.

The previous prime is 1191505001. The next prime is 1191505069. The reversal of 1191505060 is 605051911.

It is not an unprimeable number, because it can be changed into a prime (1191505069) by changing a digit.

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, 691876 + ... + 693595.

It is an arithmetic number, because the mean of its divisors is an integer number (106681344).

Almost surely, 2^1191505060 is an apocalyptic number.

1191505060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1191505060 is an abundant number, since it is smaller than the sum of its proper divisors (1368847196).

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

1191505060 is a wasteful number, since it uses less digits than its factorization.

1191505060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385523 (or 1385521 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 1191505060 is about 34518.1844829649. The cubic root of 1191505060 is about 1060.1450673654.

Adding to 1191505060 its reverse (605051911), we get a palindrome (1796556971).

The spelling of 1191505060 in words is "one billion, one hundred ninety-one million, five hundred five thousand, sixty".