1321175009 has 16 divisors (see below), whose sum is σ = 1744073856. Its totient is φ = 968928000.

The previous prime is 1321174999. The next prime is 1321175057. The reversal of 1321175009 is 9005711231.

It is a cyclic number.

It is not a de Polignac number, because 1321175009 - 2⁸ = 1321174753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321175059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503342 + ... + 505959.

It is an arithmetic number, because the mean of its divisors is an integer number (109004616).

Almost surely, 2^1321175009 is an apocalyptic number.

It is an amenable number.

1321175009 is a deficient number, since it is larger than the sum of its proper divisors (422898847).

1321175009 is a wasteful number, since it uses less digits than its factorization.

1321175009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009336.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 1321175009 is about 36347.9711813466. The cubic root of 1321175009 is about 1097.2867037057.

The spelling of 1321175009 in words is "one billion, three hundred twenty-one million, one hundred seventy-five thousand, nine".