1161343201 has 2 divisors, whose sum is σ = 1161343202. Its totient is φ = 1161343200.

The previous prime is 1161343199. The next prime is 1161343243. The reversal of 1161343201 is 1023431611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1142507601 + 18835600 = 33801^2 + 4340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161343201 - 2¹ = 1161343199 is a prime.

Together with 1161343199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1161343801) 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 as a sum of consecutive naturals, namely, 580671600 + 580671601.

It is an arithmetic number, because the mean of its divisors is an integer number (580671601).

Almost surely, 2^1161343201 is an apocalyptic number.

It is an amenable number.

1161343201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161343201 is an equidigital number, since it uses as much as digits as its factorization.

1161343201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1161343201 is about 34078.4858965301. The cubic root of 1161343201 is about 1051.1229711962.

Adding to 1161343201 its reverse (1023431611), we get a palindrome (2184774812).

The spelling of 1161343201 in words is "one billion, one hundred sixty-one million, three hundred forty-three thousand, two hundred one".