1161275001 has 8 divisors (see below), whose sum is σ = 1549433760. Its totient is φ = 773649792.

The previous prime is 1161274999. The next prime is 1161275039. The reversal of 1161275001 is 1005721611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1161275001 - 2¹ = 1161274999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161475001) by changing a digit.

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, 128280 + ... + 137033.

It is an arithmetic number, because the mean of its divisors is an integer number (193679220).

Almost surely, 2^1161275001 is an apocalyptic number.

It is an amenable number.

1161275001 is a deficient number, since it is larger than the sum of its proper divisors (388158759).

1161275001 is a wasteful number, since it uses less digits than its factorization.

1161275001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266775.

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 1161275001 is about 34077.4852505287. The cubic root of 1161275001 is about 1051.1023950249.

Adding to 1161275001 its reverse (1005721611), we get a palindrome (2166996612).

The spelling of 1161275001 in words is "one billion, one hundred sixty-one million, two hundred seventy-five thousand, one".