1144866161 has 2 divisors, whose sum is σ = 1144866162. Its totient is φ = 1144866160.

The previous prime is 1144866127. The next prime is 1144866181. The reversal of 1144866161 is 1616684411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1026817936 + 118048225 = 32044^2 + 10865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144866161 - 2⁶ = 1144866097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1144866181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572433080 + 572433081.

It is an arithmetic number, because the mean of its divisors is an integer number (572433081).

Almost surely, 2^1144866161 is an apocalyptic number.

It is an amenable number.

1144866161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144866161 is an equidigital number, since it uses as much as digits as its factorization.

1144866161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 1144866161 is about 33835.8709212575. The cubic root of 1144866161 is about 1046.1281928150.

The spelling of 1144866161 in words is "one billion, one hundred forty-four million, eight hundred sixty-six thousand, one hundred sixty-one".