1140722161 has 2 divisors, whose sum is σ = 1140722162. Its totient is φ = 1140722160.

The previous prime is 1140722147. The next prime is 1140722201. The reversal of 1140722161 is 1612270411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994771600 + 145950561 = 31540^2 + 12081^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140722161 - 2⁵ = 1140722129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1140722111) 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 as a sum of consecutive naturals, namely, 570361080 + 570361081.

It is an arithmetic number, because the mean of its divisors is an integer number (570361081).

Almost surely, 2^1140722161 is an apocalyptic number.

It is an amenable number.

1140722161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140722161 is an equidigital number, since it uses as much as digits as its factorization.

1140722161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1140722161 is about 33774.5786206135. The cubic root of 1140722161 is about 1044.8644653781.

Adding to 1140722161 its reverse (1612270411), we get a palindrome (2752992572).

The spelling of 1140722161 in words is "one billion, one hundred forty million, seven hundred twenty-two thousand, one hundred sixty-one".